FreeBSD/src c6ed46a (r351186)sys/arm64/rockchip rk_i2c.c

Improve rk_i2c driver:
- Properly handle IIC_M_NOSTOP and IIC_M_NOSTART flags.
- add polling mode, so driver can be used even if interrupts are not
  enabled (this is necessary for proper support of PMICs).
- add support for RK3288

MFC after:      2 weeks
DeltaFile
+190-98sys/arm64/rockchip/rk_i2c.c
+190-981 files

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