bfcfg: support additional UEFI settings

[kblaiech]

This commit implements the following changes:

• Update control flags for Arm settings; add flags to manage UEFI secure boot settings and UEFI password settings.
• Add extra Arm UEFI system attributes, i.e., SYS_ENABLE_I2C3 and SYS_ENABLE_FORCE_BOOT_RETRY.
• Support Arm UEFI Secure Boot PCP; to enroll UEFI secure boot certificate files.

RM #4049059 RM #4049061

Fixes: c134069 ("bfcfg: enhance 'cfg2bin' command and add 'bin2cfg' command")