Change in coreboot[master]: soc/amd/sabrina: Add prompt for AMDFW_CONFIG_FILE

[Paul Menzel (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Marshall Dawson, Jon Murphy, Fred Reitberger, Karthik Ramasubramanian, Felix Held.
Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62971 )

Change subject: soc/amd/sabrina: Add prompt for AMDFW_CONFIG_FILE
......................................................................

Patch Set 1:

(1 comment)

File src/soc/amd/sabrina/Kconfig:

https://review.coreboot.org/c/coreboot/+/62971/comment/c5607ddf_423c654b 
PS1, Line 349: 
As it is user visible now, please add a help text.