i2c: Rename SPL/TPL_I2C_SUPPORT to I2C

Rename these options so that CONFIG_IS_ENABLED can be used with them.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/arch/powerpc/cpu/mpc83xx/Kconfig b/arch/powerpc/cpu/mpc83xx/Kconfig
index 1d57048..083febe 100644
--- a/arch/powerpc/cpu/mpc83xx/Kconfig
+++ b/arch/powerpc/cpu/mpc83xx/Kconfig
@@ -122,7 +122,7 @@
 config MPC83XX_SATA_SUPPORT
 	bool
 
-config MPC83XX_SECOND_I2C_SUPPORT
+config MPC83XX_SECOND_I2C
 	bool
 
 config MPC83XX_LDP_PIN
@@ -138,14 +138,14 @@
 	select MPC83XX_TSEC1_SUPPORT
 	select MPC83XX_TSEC2_SUPPORT
 	select MPC83XX_PCIE1_SUPPORT
-	select MPC83XX_SECOND_I2C_SUPPORT
+	select MPC83XX_SECOND_I2C
 
 config ARCH_MPC8309
 	bool
 	select ARCH_MPC830X
 	select MPC83XX_QUICC_ENGINE
 	select MPC83XX_PCI_SUPPORT
-	select MPC83XX_SECOND_I2C_SUPPORT
+	select MPC83XX_SECOND_I2C
 	select SYS_FSL_ERRATUM_ESDHC111
 	select FSL_ELBC
 
@@ -158,7 +158,7 @@
 config ARCH_MPC8313
 	bool
 	select ARCH_MPC831X
-	select MPC83XX_SECOND_I2C_SUPPORT
+	select MPC83XX_SECOND_I2C
 	select FSL_ELBC
 
 config ARCH_MPC832X
@@ -176,14 +176,14 @@
 	select MPC83XX_TSEC1_SUPPORT
 	select MPC83XX_TSEC2_SUPPORT
 	select MPC83XX_LDP_PIN
-	select MPC83XX_SECOND_I2C_SUPPORT
+	select MPC83XX_SECOND_I2C
 
 config ARCH_MPC8360
 	bool
 	select MPC83XX_QUICC_ENGINE
 	select MPC83XX_PCI_SUPPORT
 	select MPC83XX_LDP_PIN
-	select MPC83XX_SECOND_I2C_SUPPORT
+	select MPC83XX_SECOND_I2C
 
 config ARCH_MPC837X
 	bool
@@ -195,7 +195,7 @@
 	select MPC83XX_SDHC_SUPPORT
 	select MPC83XX_SATA_SUPPORT
 	select MPC83XX_LDP_PIN
-	select MPC83XX_SECOND_I2C_SUPPORT
+	select MPC83XX_SECOND_I2C
 	select FSL_ELBC
 
 config SYS_IMMR