ec/lenovo/pmh7: use read/write function in clear_bit/set_bit

Make the code simpler and improve readability.

Change-Id: Ifa9308c32e4646c122254931b55fb83541a10a3c
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-on: https://review.coreboot.org/28195
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
diff --git a/src/ec/lenovo/pmh7/pmh7.c b/src/ec/lenovo/pmh7/pmh7.c
index c975679..b160fd0 100644
--- a/src/ec/lenovo/pmh7/pmh7.c
+++ b/src/ec/lenovo/pmh7/pmh7.c
@@ -68,20 +68,16 @@
 {
 	char val;
 
-	outb(reg, EC_LENOVO_PMH7_ADDR);
-	val = inb(EC_LENOVO_PMH7_DATA);
-	outb(reg, EC_LENOVO_PMH7_ADDR);
-	outb(val | (1 << bit), EC_LENOVO_PMH7_DATA);
+	val = pmh7_register_read(reg);
+	pmh7_register_write(reg, val | (1 << bit));
 }
 
 void pmh7_register_clear_bit(int reg, int bit)
 {
 	char val;
 
-	outb(reg, EC_LENOVO_PMH7_ADDR);
-	val = inb(EC_LENOVO_PMH7_DATA);
-	outb(reg, EC_LENOVO_PMH7_ADDR);
-	outb(val &= ~(1 << bit), EC_LENOVO_PMH7_DATA);
+	val = pmh7_register_read(reg);
+	pmh7_register_write(reg, val & ~(1 << bit));
 }
 
 char pmh7_register_read(int reg)