ANDROID: KVM: arm64: Fix missing mask for custom hypercall handling

Filter the hypercall id before calling the dynamic hcall handling. This
intends to fix the missing mask ARM_SMCCC_CALL_HINTS that was forgotten
during Android15 integration.

Bug: 278749606
Bug: 244543039
Bug: 244373730
Bug: 328018155
Fixes: c26e6bfe ("ANDROID: KVM: arm64: Add support for custom hypercall registration")
Suggested-by: Will Deacon <willdeacon@google.com>
Change-Id: Ifdbcad2580f2174a5d540425a3da2f3720da6e3d
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>