staging: kpc2000: kpc_spi: remove unnecessary cast in [read|write]_reg()

The kpc_spi driver unnecessarily casts from a (u64 __iomem *) to a (void
*) when invoking readq and writeq which both take a (void __iomem *) arg.
There is no need for this cast, and it actually harms us by discarding
the sparse cookie, __iomem. Make the driver stop performing this casting
operation.
Signed-off-by: Geordan Neukum <gneukum1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/kpc2000/kpc2000_spi.c

@@ -167,7 +167,7 @@ kp_spi_read_reg(struct kp_spi_controller_state *cs, int idx)
 	if ((idx == KP_SPI_REG_CONFIG) && (cs->conf_cache >= 0)){
 		return cs->conf_cache;
 	}
-	val = readq((void*)addr);
+	val = readq(addr);
 	return val;
 }
 
@@ -176,7 +176,7 @@ kp_spi_write_reg(struct kp_spi_controller_state *cs, int idx, u64 val)
 {
 	u64 __iomem *addr = cs->base;
 	addr += idx;
-	writeq(val, (void*)addr);
+	writeq(val, addr);
 	if (idx == KP_SPI_REG_CONFIG)
 		cs->conf_cache = val;
 }