support gce on mt6779 platform

[Dennis YC Hsieh]

Support gce function on mt6779 platform.
	dt-binding: gce: add gce header file for mt6779
	mailbox: cmdq: variablize address shift in platform
	mailbox: cmdq: support mt6779 gce platform
	arm64: dts: add gce node for mt6779

Refine driver to support stop hardware with safe callback.
	mailbox: mediatek: cmdq: clear task in channel

Inorder to support mt6779 client requirement, add new helper functions to
enable more hardware capability.
	soc: mediatek: cmdq: add assign function
	soc: mediatek: cmdq: add write_s function
	soc: mediatek: cmdq: add read_s function
	soc: mediatek: cmdq: add mem move function
	soc: mediatek: cmdq: add loop function
	soc: mediatek: cmdq: add wait no clear event
	soc: mediatek: cmdq: add set event function



Dennis YC Hsieh (12):
  dt-binding: gce: add gce header file for mt6779
  mailbox: cmdq: variablize address shift in platform
  mailbox: cmdq: support mt6779 gce platform definition
  mailbox: mediatek: cmdq: clear task in channel before shutdown
  arm64: dts: add gce node for mt6779
  soc: mediatek: cmdq: add assign function
  soc: mediatek: cmdq: add write_s function
  soc: mediatek: cmdq: add read_s function
  soc: mediatek: cmdq: add mem move function
  soc: mediatek: cmdq: add loop function
  soc: mediatek: cmdq: add wait no clear event function
  soc: mediatek: cmdq: add set event function

 .../devicetree/bindings/mailbox/mtk-gce.txt   |   8 +-
 arch/arm64/boot/dts/mediatek/mt6779.dtsi      |  10 +
 drivers/mailbox/mtk-cmdq-mailbox.c            |  85 ++++++-
 drivers/soc/mediatek/mtk-cmdq-helper.c        | 182 +++++++++++++-
 include/dt-bindings/gce/mt6779-gce.h          | 222 ++++++++++++++++++
 include/linux/mailbox/mtk-cmdq-mailbox.h      |   7 +
 include/linux/soc/mediatek/mtk-cmdq.h         |  77 ++++++
 7 files changed, 573 insertions(+), 18 deletions(-)
 create mode 100644 include/dt-bindings/gce/mt6779-gce.h