soc/intel: Configure PAVP at compile-time

Expose configuration of Intel PAVP (Protected Audio-Video Path, a
digital rights protection/management (DRM) technology for
multimedia content) to Kconfig.

Per the FSP default, this was always being enabled previously.

Change-Id: I2aae741bb30e3be3c64324cd6334778bd271a903
Signed-off-by: Benjamin Doron <benjamin.doron00@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42745
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/soc/intel/skylake/chip.c

@@ -428,6 +428,8 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 	else
 		params->PeiGraphicsPeimInit = 0;
 
+	params->PavpEnable = CONFIG(PAVP);
+
 	soc_irq_settings(params);
 }