rockchip: rk3368: fix PLAT_RK_CLST_TO_CPUID_SHIFT

The RK3368 has two clusters of 4 cores and it's cluster id starts at
bit 8 of the MPIDR.  To convert from the cluster id (0 or 1) to the
lowest CPU-ID in the respective cluster, we thus need to shift by 6
(i.e. shift by 8 to extract the cluster-id and multiply by 4).

This change is required to ensure the PSCI support can index the
per-cpu entry-address array correctly.
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Change-Id: I64a76038f090a85a47067f09f750e96e3946e756

plat/rockchip/rk3368/include/platform_def.h

@@ -48,7 +48,7 @@
 					 PLATFORM_CLUSTER_COUNT +	\
 					 PLATFORM_CORE_COUNT)
 
-#define PLAT_RK_CLST_TO_CPUID_SHIFT	8
+#define PLAT_RK_CLST_TO_CPUID_SHIFT	6
 
 #define PLAT_MAX_PWR_LVL		MPIDR_AFFLVL2