rust/hw/char/pl011: Extract extract DR read logic into separate function - Split `read()` DR case into `read_data_register()` Signed-off-by: Rakesh Jeyasingh <rakeshjb010@gmail.com> Link: https://lore.kernel.org/r/20250407181327.171563-2-rakeshjb010@gmail.com Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>