ARM: Add drivers/dma to arch/arm/Kconfig

Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>

arch/arm/Kconfig

@@ -1034,6 +1034,8 @@ source "drivers/mmc/Kconfig"
 
 source "drivers/rtc/Kconfig"
 
+source "drivers/dma/Kconfig"
+
 endmenu
 
 source "fs/Kconfig"