[PATCH] staging: sm750fb: remove unused variable 'tmp' in sw_i2c_wait

The variable 'tmp' in sw_i2c_wait() is written but never read outside
the loop, triggering a set-but-not-used warning with W=1. The loop
itself is a fixed-count busy-wait with no side effects; remove the
unused variable and keep the empty loop body.

Signed-off-by: Eduard Zateev <redacted>
---
 drivers/staging/sm750fb/ddk750_swi2c.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/sm750fb/ddk750_swi2c.c b/drivers/staging/sm750fb/ddk750_swi2c.c
index e63f3b00ec4c..55623ad35be2 100644
--- a/drivers/staging/sm750fb/ddk750_swi2c.c
+++ b/drivers/staging/sm750fb/ddk750_swi2c.c

@@ -92,12 +92,10 @@ static void sw_i2c_wait(void)
      * it's more reliable than counter loop ..
      * write 0x61 to 0x3ce and read from 0x3cf
      */
-	int i, tmp;
+	int i;
 
-	for (i = 0; i < 600; i++) {
-		tmp = i;
-		tmp += i;
-	}
+	for (i = 0; i < 600; i++)
+		;
 }
 
 /*

-- 
2.55.0