soc/intel/apollolake: LZ4 Compress FSP-M

FSP-M is not run XIP so it can be compressed. This more than halves
the binary size. 364544 bytes -> 168616 bytes.

On the up/squared this also results in a 83ms speedup.

TESTED: up/squared boots.

Change-Id: Ic76b51f0f3007b59ccb9f76b6a57bb9265dab833
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48158
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Sean Rhodes <sean@starlabs.systems>

src/soc/intel/apollolake/Kconfig

@@ -56,6 +56,7 @@ config CPU_SPECIFIC_OPTIONS
 	select NO_PM_ACPI_TIMER
 	select NO_UART_ON_SUPERIO
 	select NO_XIP_EARLY_STAGES
+	select FSP_COMPRESS_FSP_M_LZ4
 	select PARALLEL_MP_AP_WORK
 	select PCIEXP_ASPM
 	select PCIEXP_COMMON_CLOCK