Fixes warning because num is u32 and can never be negtative

drivers/input/keyboard/qt1050.c:371:18: warning:
comparison of unsigned expression < 0 is always false [-Wtype-limits]
   if (button.num < 0 || button.num > QT1050_MAX_KEYS - 1)

Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: ChenTao <chentao...@huawei.com>
---
 drivers/input/keyboard/qt1050.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/keyboard/qt1050.c b/drivers/input/keyboard/qt1050.c
index 403060d05c3b..a9ac99f62e39 100644
--- a/drivers/input/keyboard/qt1050.c
+++ b/drivers/input/keyboard/qt1050.c
@@ -368,7 +368,7 @@ static int qt1050_parse_fw(struct qt1050_priv *ts)
                        dev_err(dev, "Button without pad number\n");
                        goto err;
                }
-               if (button.num < 0 || button.num > QT1050_MAX_KEYS - 1)
+               if (button.num > QT1050_MAX_KEYS - 1)
                        goto err;
 
                ts->reg_keys |= BIT(button.num);
-- 
2.22.0

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