pinctrl: cherryview: Remove unused groups of pins

For the long time no one complained about unused groups of pins
for fSPI and SMBUS.

Remove them for good and at the same time satisfy compiler,
otherwise get warning:

CC      drivers/pinctrl/intel/pinctrl-cherryview.o
drivers/pinctrl/intel/pinctrl-cherryview.c:285:23: warning: ‘southwest_smbus_pins’ defined but not used [-Wunused-const-variable=]
  static const unsigned southwest_smbus_pins[] = { 79, 81, 82 };
                        ^~~~~~~~~~~~~~~~~~~~
drivers/pinctrl/intel/pinctrl-cherryview.c:269:23: warning: ‘southwest_fspi_pins’ defined but not used [-Wunused-const-variable=]
  static const unsigned southwest_fspi_pins[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
                        ^~~~~~~~~~~~~~~~~~~
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/intel/pinctrl-cherryview.c

@@ -264,7 +264,6 @@ static const struct pinctrl_pin_desc southwest_pins[] = {
 	PINCTRL_PIN(97, "GP_SSP_2_TXD"),
 };
 
-static const unsigned southwest_fspi_pins[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
 static const unsigned southwest_uart0_pins[] = { 16, 20 };
 static const unsigned southwest_uart1_pins[] = { 15, 16, 18, 20 };
 static const unsigned southwest_uart2_pins[] = { 17, 19, 21, 22 };
@@ -280,7 +279,6 @@ static const unsigned southwest_i2c4_pins[] = { 46, 50 };
 static const unsigned southwest_i2c5_pins[] = { 45, 48 };
 static const unsigned southwest_i2c6_pins[] = { 47, 51 };
 static const unsigned southwest_i2c_nfc_pins[] = { 49, 52 };
-static const unsigned southwest_smbus_pins[] = { 79, 81, 82 };
 static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 };
 
 /* LPE I2S TXD pins need to have invert_oe set */