rockchip: correct ARCH_SOC name

The ARCH_SOC name default as 'rockchip' and we put all the
header file in 'arch/arm/include/asm/arch-rockchip/', but
the 'rockchip' is not the SOC name, let's correct it after
we update all the source file.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Philipp Tomsiich <philipp.tomsich@theobroma-systems.com>
diff --git a/arch/arm/mach-rockchip/rv1108/Kconfig b/arch/arm/mach-rockchip/rv1108/Kconfig
index 8883aea..e3a63b8 100644
--- a/arch/arm/mach-rockchip/rv1108/Kconfig
+++ b/arch/arm/mach-rockchip/rv1108/Kconfig
@@ -23,7 +23,7 @@
 	  RV1108 ELGIN is a board based on the Rockchip RV1108.
 
 config SYS_SOC
-	default "rockchip"
+	default "rv1108"
 
 config SYS_MALLOC_F_LEN
 	default 0x400