ACPI: APEI: EINJ: warn on invalid argument when explicitly indicated by platform

OSPM executes an EXECUTE_OPERATION action to instruct the platform to begin
the injection operation, then executes a GET_COMMAND_STATUS action to
determine the status of the completed operation. The ACPI Specification
documented error codes[1] are:

	0 = Success (Linux #define EINJ_STATUS_SUCCESS)
	1 = Unknown failure (Linux #define EINJ_STATUS_FAIL)
	2 = Invalid Access (Linux #define EINJ_STATUS_INVAL)

The original code report -EBUSY for both "Unknown Failure" and "Invalid
Access" cases. Actually, firmware could do some platform dependent sanity
checks and returns different error codes, e.g. "Invalid Access" to indicate
to the user that the parameters they supplied cannot be used for injection.

To this end, fix to return -EINVAL in the __einj_error_inject() error
handling case instead of always -EBUSY, when explicitly indicated by the
platform in the status of the completed operation.

[1] ACPI Specification 6.5 18.6.1. Error Injection Table

Signed-off-by: Shuai Xue <xueshuai@linux.alibaba.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>