apm821xx: don't select swconfig for the MR24

The swconfig package is part of the DEFAULT_PACKAGES list in
the apm821xx's nand subtarget. It's enabled by default because
the MX60(W) and WNDR4700 need it for their initramfs. However
the package is not necessary for the MR24's sysupgrade image, as
the MR24 does not have a switch.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

target/linux/apm821xx/image/Makefile

@@ -74,7 +74,7 @@ endef
 
 define Device/meraki_mr24
   DEVICE_TITLE := Cisco Meraki MR24
-  DEVICE_PACKAGES := kmod-spi-gpio
+  DEVICE_PACKAGES := kmod-spi-gpio -swconfig
   BOARD_NAME := mr24
   DEVICE_DTS := meraki-mr24
   BLOCKSIZE := 63k