iommu: qcom: forward port iommu v1

iommu: qcom: forward port iommu v1

This is a forward port of the iommu v1 found on Qualcomm SoC
variants like MSM8974, MSM8226, APQ8084, ARCH_MSM8916

Last commit on msm-3.10 is
0afc06718e35b8f12cd7c30a798e51e9cb7d35cf Merge branch
'msm-3.10' of git://codeaurora.org/kernel/msm-3.10 into msm-3.10

Changes made:
 - drop usage of gen_pool_alloc_aligned
 - rename clk and pclk to iface and core
 - delete unused clks and regulators
 - handle EPROBE_DEFER when requesting interrupts

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>