Add support for qemuarm/64 machines with EFI

Fixes #667 (closed) Fixes docs#126 (closed)

TODO (do not merge if any pending):

• update docs
• mention new machines in build templates
• upstream edk2 and grub/grub-efi fixes - #766
• upstream the machines - #767 (closed)
• ci
• add ci jobs docs - #765
• drop unsupported machines from everywhere in this repo (qemuarm, qemuarm64, generic...)
• cleanup machine defconfigs - #770 (closed)

meta-oniro-core/conf/distro/oniro-linux.conf

@@ -72,6 +72,7 @@ PREFERRED_PROVIDER_virtual/kernel:qemuarm = "linux-oniro"
 PREFERRED_PROVIDER_virtual/kernel:qemuarm64 = "linux-oniro"
 PREFERRED_PROVIDER_virtual/kernel:qemux86 = "linux-oniro"
 PREFERRED_PROVIDER_virtual/kernel:qemux86-64 = "linux-oniro"
+PREFERRED_PROVIDER_virtual/kernel:qemuarm-efi = "linux-oniro"
 
 # qemu-generic-arm64 has issues booting past 5.10. See:
 # https://git.yoctoproject.org/meta-arm/tree/meta-arm/conf/machine/generic-arm64.conf?id=c40fb5348b1d0f8c4a1ed779c8df6ba3cf411930