brcmfmac: turn clocks on when reading shared info

Make sure backplane clocks are on while reading crash data.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Piotr Haber <phaber@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c

@@ -2699,6 +2699,7 @@ static int brcmf_sdio_readshared(struct brcmf_sdio *bus,
 	 * address of sdpcm_shared structure
 	 */
 	sdio_claim_host(bus->sdiodev->func[1]);
+	brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
 	rv = brcmf_sdbrcm_membytes(bus, false, shaddr,
 				   (u8 *)&addr_le, 4);
 	sdio_release_host(bus->sdiodev->func[1]);