soc: keystone: Merge into ti specific directory

Merge drivers/soc/keystone/ into drivers/soc/ti/
and convert CONFIG_TI_KEYSTONE_SERDES into Kconfig.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-keystone/Kconfig b/arch/arm/mach-keystone/Kconfig
index d24596e..e06eba5 100644
--- a/arch/arm/mach-keystone/Kconfig
+++ b/arch/arm/mach-keystone/Kconfig
@@ -9,18 +9,24 @@
 	select SPL_BOARD_INIT if SPL
 	select CMD_DDR3
 	imply DM_I2C
+	imply SOC_TI
+	imply TI_KEYSTONE_SERDES
 
 config TARGET_K2E_EVM
 	bool "TI Keystone 2 Edison EVM"
 	select SPL_BOARD_INIT if SPL
 	select CMD_DDR3
 	imply DM_I2C
+	imply SOC_TI
+	imply TI_KEYSTONE_SERDES
 
 config TARGET_K2L_EVM
 	bool "TI Keystone 2 Lamar EVM"
 	select SPL_BOARD_INIT if SPL
 	select CMD_DDR3
 	imply DM_I2C
+	imply SOC_TI
+	imply TI_KEYSTONE_SERDES
 
 config TARGET_K2G_EVM
 	bool "TI Keystone 2 Galileo EVM"
@@ -29,6 +35,8 @@
         select TI_I2C_BOARD_DETECT
 	select CMD_DDR3
 	imply DM_I2C
+	imply SOC_TI
+	imply TI_KEYSTONE_SERDES
 
 endchoice