[PATCH] staging: sm750fb: select FB_IOMEM_FOPS in Kconfig

The driver uses the FB_DEFAULT_IOMEM_OPS macro in sm750.c to define its
framebuffer operations. This macro references core framebuffer operations
fb_io_read, fb_io_write, and fb_io_mmap. These symbols are defined in
fb_io_fops.c, which is compiled only under CONFIG_FB_IOMEM_FOPS.

Since config FB_SM750 does not currently select FB_IOMEM_FOPS, compiling
the driver on a config that has no other framebuffer drivers enabled
fails with undefined symbol link errors during MODPOST.

Add 'select FB_IOMEM_FOPS' to Kconfig to ensure the driver core helpers
build successfully in all configurations. Keep the select statements
sorted alphabetically.

Signed-off-by: MishraMohit21 <redacted>
---
 drivers/staging/sm750fb/Kconfig | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/sm750fb/Kconfig b/drivers/staging/sm750fb/Kconfig
index 08bcccdd0f1c..7d5ad423e41f 100644
--- a/drivers/staging/sm750fb/Kconfig
+++ b/drivers/staging/sm750fb/Kconfig

@@ -2,10 +2,11 @@
 config FB_SM750
 	tristate "Silicon Motion SM750 framebuffer support"
 	depends on FB && PCI && HAS_IOPORT
-	select FB_MODE_HELPERS
-	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
+	select FB_CFB_FILLRECT
 	select FB_CFB_IMAGEBLIT
+	select FB_IOMEM_FOPS
+	select FB_MODE_HELPERS
 	help
 	  Frame buffer driver for the Silicon Motion SM750 chip
 	  with 2D acceleration and dual head support.

-- 
2.43.0