beagle_x15: add board support for Beagle x15

BeagleBoard-X15 is the next generation Open Source
Hardware BeagleBoard based on TI's AM5728 SoC
featuring dual core 1.5GHZ A15 processor. The
platform features 2GB DDR3L (w/dual 32bit busses),
eSATA, 3 USB3.0 ports, integrated HDMI (1920x108@60),
separate LCD port, video In port, 4GB eMMC, uSD,
Analog audio in/out, dual 1G Ethernet.

For more information, refer to:
http://www.elinux.org/Beagleboard:BeagleBoard-X15

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Tom Rini <trini@ti.com>
diff --git a/arch/arm/cpu/armv7/omap5/Kconfig b/arch/arm/cpu/armv7/omap5/Kconfig
index 129982c..aca862d 100644
--- a/arch/arm/cpu/armv7/omap5/Kconfig
+++ b/arch/arm/cpu/armv7/omap5/Kconfig
@@ -12,6 +12,9 @@
 config TARGET_DRA7XX_EVM
 	bool "TI DRA7XX"
 
+config TARGET_BEAGLE_X15
+	bool "BeagleBoard X15"
+
 endchoice
 
 config SYS_SOC
@@ -20,5 +23,6 @@
 source "board/compulab/cm_t54/Kconfig"
 source "board/ti/omap5_uevm/Kconfig"
 source "board/ti/dra7xx/Kconfig"
+source "board/ti/beagle_x15/Kconfig"
 
 endif