Constify the static fix_id array so it can be placed in read-only memory.

Signed-off-by: Hungyu Lin <dennylin0707@gmail.com>

---
Changes in v2:
- Drop g_fbmode change as it is modified at runtime.
---
 drivers/staging/sm750fb/sm750.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/sm750fb/sm750.c b/drivers/staging/sm750fb/sm750.c
index 62f6e0cdf..795e9164b 100644
--- a/drivers/staging/sm750fb/sm750.c
+++ b/drivers/staging/sm750fb/sm750.c
@@ -740,7 +740,7 @@ static int lynxfb_set_fbinfo(struct fb_info *info, int index)
 		"kernel HELPERS prepared vesa_modes",
 	};
 
-	static const char *fix_id[2] = {
+	static const char * const fix_id[2] = {
 		"sm750_fb1", "sm750_fb2",
 	};
 
-- 
2.34.1