ARM: keystone2: Use macro for DSP GEM power domain

Define a macro for the DSP GEM power domain id number and
use it instead of a hard-coded number in the code that
disables all the DSPs on various Keystone2 SoCs.
Signed-off-by: NSuman Anna <s-anna@ti.com>
Signed-off-by: NNishanth Menon <nm@ti.com>
Reviewed-by: NTom Rini <trini@konsulko.com>

arch/arm/mach-keystone/include/mach/hardware.h

@@ -160,6 +160,7 @@ typedef volatile unsigned int   *dv_reg_p;
 #define KS2_LPSC_GEM_0			15
 #define KS2_LPSC_TETRIS			52
 #define KS2_TETRIS_PWR_DOMAIN		31
+#define KS2_GEM_0_PWR_DOMAIN		8
 
 /* Chip configuration unlock codes and registers */
 #define KS2_KICK0			(KS2_DEVICE_STATE_CTRL_BASE + 0x38)

arch/arm/mach-keystone/keystone.c

@@ -54,7 +54,7 @@ static void turn_off_all_dsps(int num_dsps)
 		if (psc_disable_module(i + KS2_LPSC_GEM_0))
 			printf("Cannot disable module for #%d DSP", i);
 
-		if (psc_disable_domain(i + 8))
+		if (psc_disable_domain(i + KS2_GEM_0_PWR_DOMAIN))
 			printf("Cannot disable domain for #%d DSP", i);
 	}
 }