rtase: Corrects error handling of the rtase_check_mac_version_valid()

Previously, when the hardware version ID was determined to be invalid,
only an error message was printed without any further handling. Therefore,
this patch makes the necessary corrections to address this.

Fixes: a36e9f5c ("rtase: Add support for a pci table in this module")
Signed-off-by: Justin Lai <justinlai0215@realtek.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>