spi-bcm2835 depends GPIOLIB

[Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>]

I got following error on CONFIG_GPIOLIB=n.

drivers/spi/spi-bcm2835.c: In function 'chip_match_name':
drivers/spi/spi-bcm2835.c:356:21: error: dereferencing pointer to incomplete type 'struct gpio_chip'
  return !strcmp(chip->label, data);
                     ^
drivers/spi/spi-bcm2835.c: In function 'bcm2835_spi_setup':
drivers/spi/spi-bcm2835.c:382:9: error: implicit declaration of function 'gpiochip_find' [-Werror=implicit-function-declaration]
  chip = gpiochip_find("pinctrl-bcm2835", chip_match_name);
         ^
drivers/spi/spi-bcm2835.c:382:7: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
  chip = gpiochip_find("pinctrl-bcm2835", chip_match_name);
       ^
drivers/spi/spi-bcm2835.c: In function 'chip_match_name':
drivers/spi/spi-bcm2835.c:357:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Signed-off-by: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 198f96b..d5ed2a0 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -77,6 +77,7 @@ config SPI_ATMEL
 
 config SPI_BCM2835
 	tristate "BCM2835 SPI controller"
+	depends on GPIOLIB
 	depends on ARCH_BCM2835 || COMPILE_TEST
 	help
 	  This selects a driver for the Broadcom BCM2835 SPI master.

-- 
Yoshinori Sato
<ysato@xxxxxxxxxxxxxxxxxxxx>
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