PCI/VGA: Correct vga_str_to_iostate() io_state parameter type

Previously vga_str_to_iostate() took "int *io_state", but vga_arb_write()
is the only caller and it passes "unsigned int *".  Make the
vga_str_to_iostate() parameter type "unsigned int *" to match.

[bhelgaas: commit log]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sui Jingfeng <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Andi Shyti <[email protected]>
Reviewed-by: Ilpo Järvinen <[email protected]>

Author: Sui Jingfeng

drivers/pci/vgaarb.c

@@ -77,7 +77,7 @@ static const char *vga_iostate_to_str(unsigned int iostate)
 	return "none";
 }
 
-static int vga_str_to_iostate(char *buf, int str_size, int *io_state)
+static int vga_str_to_iostate(char *buf, int str_size, unsigned int *io_state)
 {
 	/* we could in theory hand out locks on IO and mem
 	 * separately to userspace but it can cause deadlocks */