drivers/spi: remove SPI_FLASH_FAST_READ_DUAL_OUTPUT_3B option

The SPI_FLASH_FAST_READ_DUAL_OUTPUT_3B option is no longer
being used in the code. There's a runtime check for supporting
fast read dual output mode of the spi flash. Remove the references
to SPI_FLASH_FAST_READ_DUAL_OUTPUT_3B.

Change-Id: Ie7d9d3f91f29a700f07ab33feaf427a872bbf7df
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38166
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/spi/Kconfig

@@ -149,15 +149,6 @@ config SPI_FLASH_WINBOND
 	  Select this option if your chipset driver needs to store certain
 	  data in the SPI flash and your SPI flash is made by Winbond.
 
-config SPI_FLASH_FAST_READ_DUAL_OUTPUT_3B
-	bool
-	default n
-	depends on SPI_FLASH
-	help
-	  Select this option if your SPI flash supports the fast read dual-
-	  output command (opcode 0x3b) where the opcode and address are sent
-	  to the chip on MOSI and data is received on both MOSI and MISO.
-
 config SPI_FLASH_HAS_VOLATILE_GROUP
 	bool
 	default n

src/mainboard/google/nyan/Kconfig

@@ -27,7 +27,6 @@ config BOARD_SPECIFIC_OPTIONS
 	select SPI_FLASH
 	select SPI_FLASH_GIGADEVICE
 	select SPI_FLASH_WINBOND
-	select SPI_FLASH_FAST_READ_DUAL_OUTPUT_3B
 
 config VBOOT
 	select EC_GOOGLE_CHROMEEC_SWITCHES

src/mainboard/google/nyan_big/Kconfig

@@ -27,7 +27,6 @@ config BOARD_SPECIFIC_OPTIONS
 	select SPI_FLASH
 	select SPI_FLASH_GIGADEVICE
 	select SPI_FLASH_WINBOND
-	select SPI_FLASH_FAST_READ_DUAL_OUTPUT_3B
 	select MAINBOARD_HAS_I2C_TPM_GENERIC
 	select MAINBOARD_HAS_TPM1
 

src/mainboard/google/nyan_blaze/Kconfig

@@ -27,7 +27,6 @@ config BOARD_SPECIFIC_OPTIONS
 	select SPI_FLASH
 	select SPI_FLASH_GIGADEVICE
 	select SPI_FLASH_WINBOND
-	select SPI_FLASH_FAST_READ_DUAL_OUTPUT_3B
 	select MAINBOARD_HAS_I2C_TPM_GENERIC
 	select MAINBOARD_HAS_TPM1