ANDROID: KVM: arm64: Always declare pKVM module loading functions

Move __pkvm_register_el2_call and __pkvm_load_el2_module out of the
MODULE ifdef so the associated EXPORT_SYMBOL are never alone.

Bug: 244543039
Bug: 244373730
Reported-by: kernel test robot <lkp@intel.com>
Change-Id: Icdac2ccd32d09388472c6500d4af951cc23439fb
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>