ARM: rmobile: Drop unused macros from Gen3 boards

Drop unused MSTP macros from Gen3 boards. These are no longer needed
as the boards are using clock framework to manipulate clock.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

board/renesas/salvator-x/salvator-x.c

@@ -31,7 +31,6 @@ void s_init(void)
 {
 }
 
-#define SCIF2_MSTP310		BIT(10)	/* SCIF2 */
 #define DVFS_MSTP926		BIT(26)
 #define HSUSB_MSTP704		BIT(4)	/* HSUSB */
 

board/renesas/ulcb/ulcb.c

@@ -30,8 +30,6 @@ void s_init(void)
 {
 }
 
-#define GSX_MSTP112		BIT(12)	/* 3DG */
-#define SCIF2_MSTP310		BIT(10)	/* SCIF2 */
 #define DVFS_MSTP926		BIT(26)
 #define HSUSB_MSTP704		BIT(4)	/* HSUSB */