linux-imx

mmc: sdhci: Get rid of 'extern' in header file

Get rid of unnecessary 'extern' in header file.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>