rcar_gen3: drivers: ddr: Replace BITn with BIT(n) macro

Remove the ad-hoc BITn macros and replace them with generic BIT(n) macro.
No functional change.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Change-Id: I5d0b44d6cba5a69895fed505f6ff780d3574907f
diff --git a/drivers/staging/renesas/rcar/ddr/ddr_b/boot_init_dram.c b/drivers/staging/renesas/rcar/ddr/ddr_b/boot_init_dram.c
index 9c53074..89d666c 100644
--- a/drivers/staging/renesas/rcar/ddr/ddr_b/boot_init_dram.c
+++ b/drivers/staging/renesas/rcar/ddr/ddr_b/boot_init_dram.c
@@ -4221,10 +4221,10 @@
 	Thermal sensor setting
 	***********************************************************************/
 	dataL = mmio_read_32(CPG_MSTPSR5);
-	if (dataL & BIT22) {	/*  case THS/TSC Standby */
-		dataL &= ~(BIT22);
+	if (dataL & BIT(22)) {	/*  case THS/TSC Standby */
+		dataL &= ~(BIT(22));
 		cpg_write_32(CPG_SMSTPCR5, dataL);
-		while ((BIT22) & mmio_read_32(CPG_MSTPSR5));  /*  wait bit=0 */
+		while ((BIT(22)) & mmio_read_32(CPG_MSTPSR5));  /*  wait bit=0 */
 	}
 
 	/* THCTR Bit6: PONM=0 , Bit0: THSST=0   */