soc/qualcomm/qcs405: Remove unused QCS405_BLSP_SPI

Change-Id: I73ff8adeb2751ed4035c60f7387576460bdd47e8
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37966
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/soc/qualcomm/qcs405/Kconfig

@@ -18,11 +18,6 @@ config VBOOT
 	select VBOOT_RETURN_FROM_VERSTAGE
 	select VBOOT_STARTS_IN_BOOTBLOCK
 
-config QCS405_BLSP_SPI
-	bool
-	default y
-	prompt "Build Flash Using SPI-NOR"
-
 config BOOT_DEVICE_SPI_FLASH_BUS
 	int
 	default 5