xe: Update GUC to v70.54.0 for BMG, PTL

Julia Filipchukrequested to merge
jbfil/drm-firmware:guc/v70540rel into intel-staging

UAPI compatibility version 1.27.0

Release latest recommended GUC release for BMG, PTL.

Signed-off-by: Julia Filipchuk julia.filipchuk@intel.com

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