MAINTAINERS: fix typo in file name

Commit e31f941c ("MAINTAINERS: update list of qcom drivers") had a
typo in the filename, replace the underscore with dash.

Fixes: e31f941c ("MAINTAINERS: update list of qcom drivers")
Reported-by: Joe Perches <joe@perches.com>
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <agross@kernel.org>

MAINTAINERS

@@ -2066,7 +2066,7 @@ F:	drivers/i2c/busses/i2c-qup.c
 F:	drivers/i2c/busses/i2c-qcom-geni.c
 F:	drivers/mfd/ssbi.c
 F:	drivers/mmc/host/mmci_qcom*
-F:	drivers/mmc/host/sdhci_msm.c
+F:	drivers/mmc/host/sdhci-msm.c
 F:	drivers/pci/controller/dwc/pcie-qcom.c
 F:	drivers/phy/qualcomm/
 F:	drivers/power/*/msm*