pcmcia: Removed unused variable control.

Kernel test robot throws below warning ->
drivers/pcmcia/omap_cf.c:127:7: warning: variable 'control'
set but not used [-Wunused-but-set-variable]

Removed unused variable control.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Souptick Joarder (HPE) <jrdr.linux@gmail.com>
[linux@dominikbrodowski.net: retain omap_readw() call, as it might be required]
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

drivers/pcmcia/omap_cf.c

@@ -124,8 +124,6 @@ static int omap_cf_get_status(struct pcmcia_socket *s, u_int *sp)
 static int
 omap_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
 {
-	u16		control;
-
 	/* REVISIT some non-OSK boards may support power switching */
 	switch (s->Vcc) {
 	case 0:
@@ -135,7 +133,7 @@ omap_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
 		return -EINVAL;
 	}
 
-	control = omap_readw(CF_CONTROL);
+	omap_readw(CF_CONTROL);
 	if (s->flags & SS_RESET)
 		omap_writew(CF_CONTROL_RESET, CF_CONTROL);
 	else