Revert "MLK-14498-2 ARM: imx7d: clk: select uart clock parent and rate"

This reverts commit 4f447cb8bccb1d40973e46478d7b11aa61961c90.
The commit changes the parent of UART5 from OSC to PLL , cause earlycon
baudrate error.

Change-Id: I06ff91eb54b16c89d3741eb985868b8b842205f0
(cherry picked from commit c3a453462faee5a94a6722f19427444138b8925c)
1 file changed