This reverts commit 50a6bd00.

As zynqmp mini emmc does not rely on firmware, remove firmware related
device tree modes from zynqmp mini emmc dts files.
Signed-off-by: NT Karthik Reddy <t.karthik.reddy@xilinx.com>
Acked-by: NAshok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: NMichal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/e69b30d82b0307c563fe72630d9172e53964aeda.1652262769.git.michal.simek@amd.com