platform/x86: apple-gmux: don't use be32_to_cpu and cpu_to_be32

Sparce doesn't seem to like using be32_to_cpu and cpu_to_be32 to convert
values for the MMIO gmux to/from the host architecture.

Instead use iowrite32be and ioread32be to always convert, which should be
fine because apple-gmux is only used on x86 with is always little endian.

Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Orlando Chamberlain <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Hans de Goede <[email protected]>
Signed-off-by: Hans de Goede <[email protected]>

Author: Redecorating

drivers/platform/x86/apple-gmux.c

@@ -278,7 +278,7 @@ static u32 gmux_mmio_read32(struct apple_gmux_data *gmux_data, int port)
 	iowrite8(GMUX_MMIO_READ | sizeof(val),
 		gmux_data->iomem_base + GMUX_MMIO_COMMAND_SEND);
 	gmux_mmio_wait(gmux_data);
-	val = be32_to_cpu(ioread32(gmux_data->iomem_base));
+	val = ioread32be(gmux_data->iomem_base);
 	mutex_unlock(&gmux_data->index_lock);
 
 	return val;
@@ -288,7 +288,7 @@ static void gmux_mmio_write32(struct apple_gmux_data *gmux_data, int port,
 			       u32 val)
 {
 	mutex_lock(&gmux_data->index_lock);
-	iowrite32(cpu_to_be32(val), gmux_data->iomem_base);
+	iowrite32be(val, gmux_data->iomem_base);
 	iowrite8(port & 0xff, gmux_data->iomem_base + GMUX_MMIO_PORT_SELECT);
 	iowrite8(GMUX_MMIO_WRITE | sizeof(val),
 		gmux_data->iomem_base + GMUX_MMIO_COMMAND_SEND);