arm: dts: exynos: Remove outdated DW MMC properties in all Exynos dts

arm: dts: exynos: Remove outdated DW MMC properties in all Exynos dts

Upstream properties were added to device trees to follow current Linux
kernel. DW MMC driver was updated accordingly. Safely remove outdated
MMC properties. Details on removed properties are as follows:

* samsung,removable: replaced by non-removable
* samsung,bus-width: replaced by bus-width
* samsung,timing:
  - replaced by samsung,dw-mshc-ciu-div and samsung,dw-mshc-sdr-timing
    in dw_mmc nodes
  - removed from sdhci nodes (it's neither described in bindings, nor
    it's used in s5p_sdhci.c driver)
* fifoth_val: replaced by fifo-depth
* bus_hz: replaced by clock-frequency
* div: the fixed CIU clock divider value was moved to the chip data in
  exynos_dw_mmc.c driver

No functional change.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>