armv8: kconfig: Fix some platforms incorrect I2C clock divider

By default, i2c input clock is platform clk / 2, but some of the
platform of i2c clock divider does not meet this kind of circumstance,
so alone to set default values for these platforms.
Signed-off-by: Chuanhua Han <chuanhua.han@nxp.com>
Reviewed-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>

arch/arm/cpu/armv8/fsl-layerscape/Kconfig

@@ -497,6 +497,10 @@ config SYS_FSL_DUART_CLK_DIV
 config SYS_FSL_I2C_CLK_DIV
 	int "I2C clock divider"
 	default 1 if ARCH_LS1043A
+	default 4 if ARCH_LS1012A
+	default 4 if ARCH_LS1028A
+	default 8 if ARCH_LX2160A
+	default 8 if ARCH_LS1088A
 	default 2
 	help
 	  This is the divider that is used to derive I2C clock from Platform