ahci: imx: Explicitly clear IMX6Q_GPR13_SATA_MPLL_CLK_EN
ahci: imx: Explicitly clear IMX6Q_GPR13_SATA_MPLL_CLK_EN

We must clear this IMX6Q_GPR13_SATA_MPLL_CLK_EN bit on i.MX6Q, otherwise
Linux will fail to find the attached drive on some boards.

This entire fix was:
Reported-by: Eric Nelson <eric.nelson@boundarydevices.com>

Signed-off-by: Marek Vasut <f40600653b33f5282fa4c5daf377dfc444fb4625@denx.de>
Reviewed-by: Shawn Guo <912cf7eb7d8018e2943586ae6657d21fd4e38239@linaro.org>
Cc: Richard Zhu <745816b10228d666aef7119ae868544c37433c8d@freescale.com>
Cc: Linux-IDE <4f904a8dc23503d52894680e3db9d0b72a4e365e@vger.kernel.org>
Signed-off-by: Tejun Heo <546b05909706652891a87f7bfe385ae147f61f91@kernel.org>
Cc: 4fbacc2fa0ffdbb11bf1ad6925b886ebd08dd15f@vger.kernel.org

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs