lcd4taihu: fix checkpatch warning Use #include <linux/uaccess.h> instead of <asm/uaccess.h>

Checkpatch complains that:
WARNING: Use #include <linux/uaccess.h> instead of <asm/uaccess.h>
+#include <asm/uaccess.h>

-> Replace with linux/uaccess.h

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
lcd4taihu: fix checkpatch warning  "foo * bar" should be "foo *bar"

fix  "foo * bar" should be "foo *bar" by replacing it accordingly

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
lcd4taihu: fix checkpatch warning  do not use C99 // comments

use /* */ instead

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
lcd4taihu: use pr_err / pr_debug instead of printk directly

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
lcd4taihu: fix checkpatch warning "do not use assignment in if condition"

Simply move the assignment before the if.

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
lcd4taihu: Convert to kstrtou8

simple_strol is deprecated so use kstrou8 instead

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
lcd4taihu: constify struct file_operations

these are const, so mark them const

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>