staging: rtl8712: fix kmalloc parameters

After the commit 91d435f replaced _malloc with kmalloc, smatch picked up a
couple of new warnings. This fixes warnings:

warn: struct type mismatch 'writePTM_parm vs setdig_parm'
warn: struct type mismatch 'writePTM_parm vs setra_parm'

The difference is u8 vs unsigned char.

Signed-off-by: Vitaly Osipov <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/rtl8712/rtl871x_cmd.c

···
 	ph2c = kmalloc(sizeof(struct cmd_obj), GFP_ATOMIC);
 	if (ph2c == NULL)
 		return _FAIL;
-	pwriteptmparm = kmalloc(sizeof(struct setdig_parm), GFP_ATOMIC);
+	pwriteptmparm = kmalloc(sizeof(struct writePTM_parm), GFP_ATOMIC);
 	if (pwriteptmparm == NULL) {
 		kfree((u8 *) ph2c);
 		return _FAIL;
···
 	ph2c = kmalloc(sizeof(struct cmd_obj), GFP_ATOMIC);
 	if (ph2c == NULL)
 		return _FAIL;
-	pwriteptmparm = kmalloc(sizeof(struct setra_parm), GFP_ATOMIC);
+	pwriteptmparm = kmalloc(sizeof(struct writePTM_parm), GFP_ATOMIC);
 	if (pwriteptmparm == NULL) {
 		kfree((u8 *) ph2c);
 		return _FAIL;