ath10k-ct driver: use dma_alloc_coherent, 4.13 based driver

This should help ath10k work on systems with little or no IOMMU
memory.  apu2 can boot two 9888 NICs now, for instance.  From
upstream patch by Adrian Chadd.

And, start building the 4.13 based CT ath10k driver.

Signed-off-by: Ben Greear <greearb@candelatech.com>

package/kernel/ath10k-ct/Makefile

@@ -8,13 +8,18 @@ PKG_LICENSE_FILES:=
 
 PKG_SOURCE_URL:=https://github.com/greearb/ath10k-ct.git
 PKG_SOURCE_PROTO:=git
-PKG_SOURCE_DATE:=2017-05-16
+PKG_SOURCE_DATE:=2017-06-13
-PKG_SOURCE_VERSION:=c048ef0c3eedf99b41bc12b3f4e47ef3d9fab484
+PKG_SOURCE_VERSION:=bded1823912549017d819d1796273b3134c3de20
-PKG_MIRROR_HASH:=7936293962a10a0da7469759623013fc151019a6a584cfc6416bc0b605bd74d7
+PKG_MIRROR_HASH:=616174650e12a82edb6b6bd18ac186e2c6a48fdad0082df9d2011ab20940814b
 
 PKG_MAINTAINER:=Ben Greear <greearb@candelatech.com>
 PKG_BUILD_PARALLEL:=1
 
+# Build the 4.13 ath10k-ct driver version.  Other options are "-4.9", or
+# leave un-defined for 4.7 kernel.  Probably this should match as closely as
+# possible to whatever mac80211 backports version is being used.
+CT_KVER="-4.13"
+
 STAMP_CONFIGURED_DEPENDS := $(STAGING_DIR)/usr/include/mac80211-backport/backport/autoconf.h
 
 include $(INCLUDE_DIR)/kernel.mk
@@ -25,8 +30,8 @@ define KernelPackage/ath10k-ct
   TITLE:=ath10k-ct driver optimized for CT ath10k firmware
   DEPENDS:=+kmod-mac80211 +kmod-ath +@DRIVER_11N_SUPPORT +@DRIVER_11AC_SUPPORT @PCI_SUPPORT +@KERNEL_RELAY +kmod-hwmon-core
   FILES:=\
-	$(PKG_BUILD_DIR)/ath10k/ath10k_pci.ko \
+	$(PKG_BUILD_DIR)/ath10k$(CT_KVER)/ath10k_pci.ko \
-	$(PKG_BUILD_DIR)/ath10k/ath10k_core.ko
+	$(PKG_BUILD_DIR)/ath10k$(CT_KVER)/ath10k_core.ko
   AUTOLOAD:=$(call AutoLoad,50,mac80211 ath ath10k_core ath10k_pci)
 endef
 
@@ -75,7 +80,7 @@ define Build/Compile
 	+$(MAKE) $(CT_MAKEDEFS) $(PKG_JOBS) -C "$(LINUX_DIR)" \
 		ARCH="$(LINUX_KARCH)" \
 		CROSS_COMPILE="$(TARGET_CROSS)" \
-		SUBDIRS="$(PKG_BUILD_DIR)/ath10k" \
+		SUBDIRS="$(PKG_BUILD_DIR)/ath10k$(CT_KVER)" \
 		NOSTDINC_FLAGS="$(NOSTDINC_FLAGS)" \
 		modules
 endef