soc/intel: Use correct terminology for SPI flash operations

FPR is an attribute of the SPI flash component and not of the SPI bus
itself. Rename functions, file names and Kconfig option to make sure
this is conveyed correctly.

BUG=None
BRANCH=None
TEST=Compiles successfully.

Change-Id: I9f06f1a8ee28b8c56db64ddd6a19dd9179c54f50
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17560
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/apollolake/Kconfig

@@ -52,7 +52,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SOC_INTEL_COMMON_ACPI_WAKE_SOURCE
 	select SOC_INTEL_COMMON_LPSS_I2C
 	select SOC_INTEL_COMMON_SMI
-	select SOC_INTEL_COMMON_SPI_PROTECT
+	select SOC_INTEL_COMMON_SPI_FLASH_PROTECT
 	select UDELAY_TSC
 	select TSC_CONSTANT_RATE
 	select TSC_MONOTONIC_TIMER