hwmon: (ibmaem) fix checkpatch issues

fixed:
WARNING: please, no space before tabs
+{"power3_average", ^I  aem2_show_pcap_value,^IPOWER_AUX},$
Signed-off-by: NFrans Meulenbroeks <fransmeulenbroeks@gmail.com>
Acked-by: NDarrick J. Wong <djwong@us.ibm.com>
Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>