brcmfmac: allow storing PMU core without wrapper address

Separated PMU core can be found in new devices and should be used for
accessing PMU registers (which were routed through ChipCommon so far).
This core is one of exceptions that doesn't have or need wrapper address
to be still safely accessible.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c

@@ -883,7 +883,8 @@ int brcmf_chip_dmp_erom_scan(struct brcmf_chip_priv *ci)
 		rev = (val & DMP_COMP_REVISION) >> DMP_COMP_REVISION_S;
 
 		/* need core with ports */
-		if (nmw + nsw == 0)
+		if (nmw + nsw == 0 &&
+		    id != BCMA_CORE_PMU)
 			continue;
 
 		/* try to obtain register address info */