mfd: stmpe: Use generic bit mask name

In order to prepare the ground to STMPE1600,
as STMPE1600's SYS_CTRL register has the same layout as
STMPE801 variant, unify STMPExxx_REG_SYS_CTRL_RESET/INT_EN/INT_HI
bit masks to more generic STMPE_SYS_CTRL_RESET/INT_EN/INT_HI

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
index 8500525..a070476 100644
--- a/drivers/mfd/stmpe.c
+++ b/drivers/mfd/stmpe.c
@@ -1110,7 +1110,7 @@
 
 	if (stmpe->irq >= 0) {
 		if (id == STMPE801_ID)
-			icr = STMPE801_REG_SYS_CTRL_INT_EN;
+			icr = STMPE_SYS_CTRL_INT_EN;
 		else
 			icr = STMPE_ICR_LSB_GIM;
 
@@ -1124,7 +1124,7 @@
 		if (irq_trigger == IRQF_TRIGGER_RISING ||
 				irq_trigger == IRQF_TRIGGER_HIGH) {
 			if (id == STMPE801_ID)
-				icr |= STMPE801_REG_SYS_CTRL_INT_HI;
+				icr |= STMPE_SYS_CTRL_INT_HI;
 			else
 				icr |= STMPE_ICR_LSB_HIGH;
 		}