deepin: arm64: deepin_desktop_defconfig: remove IOMMU_DEFAULT_PASSTHROUGH to default

deepin inclusion
category: other

Removed CONFIG_IOMMU_DEFAULT_PASSTHROUGH=y from defconfig to
enforce strict DMA isolation by default.
This change aligns ARM64 desktop kernel configuration with other arch.

The config also affect cix in link [1].

Note that may bring some affect in some phytium FT2000 or Kunpeng 920 device.

Link: #1335
Fixes: 7821b9fb89ca ("add #880 config")
Fixes: ce41a38 ("arm64: Add deepin_arm64_desktop_defconfig")
Reported-by: Dylan.Wu" <Dylan.Wu@cixtech.com>
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
(cherry picked from commit 071876b)
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>

Author: opsiff

arch/arm64/configs/deepin_arm64_desktop_defconfig

@@ -3797,7 +3797,6 @@ CONFIG_MTK_CMDQ_MBOX=m
 CONFIG_SPRD_MBOX=m
 CONFIG_QCOM_IPCC=m
 CONFIG_IOMMU_IO_PGTABLE_ARMV7S=y
-CONFIG_IOMMU_DEFAULT_PASSTHROUGH=y
 CONFIG_IOMMUFD=m
 CONFIG_ARM_SMMU=y
 CONFIG_ARM_SMMU_V3=y