[ARM] remove memzero()

As suggested by Andrew Morton, remove memzero() - it's not supported
on other architectures so use of it is a potential build breaking bug.
Since the compiler optimizes memset(x,0,n) to __memzero() perfectly
well, we don't miss out on the underlying benefits of memzero().

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c
index e4c0db4..9e48545 100644
--- a/drivers/mfd/asic3.c
+++ b/drivers/mfd/asic3.c
@@ -474,9 +474,9 @@
 	u16 dir_reg[ASIC3_NUM_GPIO_BANKS];
 	int i;
 
-	memzero(alt_reg, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
-	memzero(out_reg, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
-	memzero(dir_reg, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
+	memset(alt_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
+	memset(out_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
+	memset(dir_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
 
 	/* Enable all GPIOs */
 	asic3_write_register(asic, ASIC3_GPIO_OFFSET(A, MASK), 0xffff);