mmc: sdhci: use lower_32_bit2() and upper_32_bits() for setting adma_addr

Use {lower,upper}_32_bits() instead of the combination of cast
and shift.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>