MAINTAINERS: Update the files to include the Qualcomm DMA folder

Recently all qcom dma drivers were moved a separate directory. Update
the files to include the same
Signed-off-by: Pramod Gurav <pramod.gurav@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

MAINTAINERS

@@ -1628,6 +1628,7 @@ F:	arch/arm64/boot/dts/qcom/*
 F:	drivers/i2c/busses/i2c-qup.c
 F:	drivers/clk/qcom/
 F:	drivers/pinctrl/qcom/
+F:	drivers/dma/qcom/
 F:	drivers/soc/qcom/
 F:	drivers/spi/spi-qup.c
 F:	drivers/tty/serial/msm_serial.h