ACPI: pfr_telemetry: remove redundant error check on ret

ACPI: pfr_telemetry: remove redundant error check on ret

The variable ret is initialized to zero and a littler later in
the PFRT_LOG_IOC_GET_INFO case of a switch statement is being checked
for negative error value. Since ret has not been re-assigned since
the initialization ret can never be less than zero so the check is
redundant and can be removed. Remove it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://patch.msgid.link/20241014130522.1986428-1-colin.i.king@gmail.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>