ARM: keystone2: psc: use common PSC base

Use common keystone2 Power Sleep controller base address instead of
directly deciding which keystone2 SoC is used in psc module.

Acked-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
diff --git a/arch/arm/include/asm/arch-keystone/hardware.h b/arch/arm/include/asm/arch-keystone/hardware.h
index ffdecbf..4e49143 100644
--- a/arch/arm/include/asm/arch-keystone/hardware.h
+++ b/arch/arm/include/asm/arch-keystone/hardware.h
@@ -119,6 +119,9 @@
 #define KS2_UART0_BASE                	0x02530c00
 #define KS2_UART1_BASE                	0x02531000
 
+/* PSC */
+#define KS2_PSC_BASE			0x02350000
+
 /* AEMIF */
 #define KS2_AEMIF_CNTRL_BASE       	0x21000a00
 #define DAVINCI_ASYNC_EMIF_CNTRL_BASE   KS2_AEMIF_CNTRL_BASE