ar71xx: refresh and cleanup mikrotik subtarget kernel config

Refresh mikrotik subtarget kernel config and enable kernel support for
boards which belong to this subtarget only.

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

target/linux/ar71xx/mikrotik/config-default

@@ -1,4 +1,5 @@
 # CONFIG_ATH79_DEV_DSA is not set
+# CONFIG_ATH79_MACH_A60 is not set
 # CONFIG_ATH79_MACH_ALFA_AP120C is not set
 # CONFIG_ATH79_MACH_ALFA_AP96 is not set
 # CONFIG_ATH79_MACH_ALFA_NX is not set
@@ -27,7 +28,6 @@
 # CONFIG_ATH79_MACH_BHU_BXU2000N2_A is not set
 # CONFIG_ATH79_MACH_BSB is not set
 # CONFIG_ATH79_MACH_C55 is not set
-# CONFIG_ATH79_MACH_C60 is not set
 # CONFIG_ATH79_MACH_CAP324 is not set
 # CONFIG_ATH79_MACH_CAP4200AG is not set
 # CONFIG_ATH79_MACH_CARAMBOLA2 is not set
@@ -57,7 +57,6 @@
 # CONFIG_ATH79_MACH_DLAN_HOTSPOT is not set
 # CONFIG_ATH79_MACH_DLAN_PRO_1200_AC is not set
 # CONFIG_ATH79_MACH_DLAN_PRO_500_WP is not set
-# CONFIG_ATH79_MACH_DOMYWIFI_DW33D is not set
 # CONFIG_ATH79_MACH_DR344 is not set
 # CONFIG_ATH79_MACH_DR531 is not set
 # CONFIG_ATH79_MACH_DRAGINO2 is not set
@@ -73,11 +72,11 @@
 # CONFIG_ATH79_MACH_ESR900 is not set
 # CONFIG_ATH79_MACH_EW_DORIN is not set
 # CONFIG_ATH79_MACH_F9K1115V2 is not set
+# CONFIG_ATH79_MACH_FRITZ300E is not set
 # CONFIG_ATH79_MACH_GL_AR150 is not set
 # CONFIG_ATH79_MACH_GL_AR300 is not set
 # CONFIG_ATH79_MACH_GL_AR300M is not set
 # CONFIG_ATH79_MACH_GL_DOMINO is not set
-# CONFIG_ATH79_MACH_FRITZ300E is not set
 # CONFIG_ATH79_MACH_GL_INET is not set
 # CONFIG_ATH79_MACH_GL_MIFI is not set
 # CONFIG_ATH79_MACH_GS_MINIBOX_V1 is not set
@@ -92,7 +91,6 @@
 # CONFIG_ATH79_MACH_MR12 is not set
 # CONFIG_ATH79_MACH_MR16 is not set
 # CONFIG_ATH79_MACH_MR1750 is not set
-# CONFIG_ATH79_MACH_MR18 is not set
 # CONFIG_ATH79_MACH_MR600 is not set
 # CONFIG_ATH79_MACH_MR900 is not set
 # CONFIG_ATH79_MACH_MYNET_N600 is not set
@@ -114,7 +112,6 @@
 # CONFIG_ATH79_MACH_PQI_AIR_PEN is not set
 # CONFIG_ATH79_MACH_QIHOO_C301 is not set
 # CONFIG_ATH79_MACH_R602N is not set
-# CONFIG_ATH79_MACH_R6100 is not set
 CONFIG_ATH79_MACH_RB2011=y
 CONFIG_ATH79_MACH_RB4XX=y
 CONFIG_ATH79_MACH_RB750=y
@@ -187,7 +184,6 @@ CONFIG_ATH79_MACH_RBSXTLITE=y
 # CONFIG_ATH79_MACH_WLR8100 is not set
 # CONFIG_ATH79_MACH_WNDAP360 is not set
 # CONFIG_ATH79_MACH_WNDR3700 is not set
-# CONFIG_ATH79_MACH_WNDR4300 is not set
 # CONFIG_ATH79_MACH_WNR2000 is not set
 # CONFIG_ATH79_MACH_WNR2000_V3 is not set
 # CONFIG_ATH79_MACH_WNR2000_V4 is not set
@@ -208,7 +204,6 @@ CONFIG_ATH79_MACH_RBSXTLITE=y
 # CONFIG_ATH79_MACH_WZR_HP_G300NH2 is not set
 # CONFIG_ATH79_MACH_WZR_HP_G450H is not set
 # CONFIG_ATH79_MACH_XD3200 is not set
-# CONFIG_ATH79_MACH_Z1 is not set
 # CONFIG_ATH79_MACH_ZBT_WE1526 is not set
 # CONFIG_ATH79_MACH_ZCN_1523H is not set
 # CONFIG_ATH79_NVRAM is not set
@@ -216,7 +211,6 @@ CONFIG_ATH79_ROUTERBOOT=y
 CONFIG_CMDLINE="rootfstype=squashfs noinitrd"
 CONFIG_CRC16=y
 CONFIG_CRYPTO_DEFLATE=y
-CONFIG_GPIO_74X164=y
 CONFIG_GPIO_LATCH=y
 # CONFIG_LANTIQ_PHY is not set
 CONFIG_LEDS_RB750=y