Amazon Kindle Fire (first generation) codename kc1 support

The Amazon Kindle Fire (first generation) codename kc1 is a tablet that was
released by Amazon back in 2011.

It is using an OMAP4430 SoC GP version, which allows running U-Boot and the
U-Boot SPL from the ground up.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
diff --git a/arch/arm/cpu/armv7/omap4/Kconfig b/arch/arm/cpu/armv7/omap4/Kconfig
index df27ea1..49adb8e 100644
--- a/arch/arm/cpu/armv7/omap4/Kconfig
+++ b/arch/arm/cpu/armv7/omap4/Kconfig
@@ -13,6 +13,9 @@
 config TARGET_OMAP4_SDP4430
 	bool "TI OMAP4 SDP4430"
 
+config TARGET_KC1
+	bool "Amazon Kindle Fire (first generation)"
+
 endchoice
 
 config SYS_SOC
@@ -21,5 +24,6 @@
 source "board/gumstix/duovero/Kconfig"
 source "board/ti/panda/Kconfig"
 source "board/ti/sdp4430/Kconfig"
+source "board/amazon/kc1/Kconfig"
 
 endif