video: fbdev: tdfx: Fix set but not used warning in att_outb()

The tmp variable was assigned but the result was never used,
so delete the tmp variable.

v2:
- Update subject (Lee)

Signed-off-by: Sam Ravnborg <[e-mail]>
Acked-by: Thomas Zimmermann <[e-mail]>
Cc: "Gustavo A. R. Silva" <[e-mail]>
Cc: Sam Ravnborg <[e-mail]>
Cc: Jani Nikula <[e-mail]>
Cc: Daniel Vetter <[e-mail]>
Cc: Arnd Bergmann <[e-mail]>
Cc: Lee Jones <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/video/fbdev/tdfxfb.c

···
 
 static inline void att_outb(struct tdfx_par *par, u32 idx, u8 val)
 {
-	unsigned char tmp;
-
-	tmp = vga_inb(par, IS1_R);
+	vga_inb(par, IS1_R);
 	vga_outb(par, ATT_IW, idx);
 	vga_outb(par, ATT_IW, val);
 }