Revert "Fix data abort caused by mis-aligning FIT data"

This reverts commit eb39d8ba.
The commit breaks booting of fitImage by SPL, the system simply hangs.
This is because on arm32, the fitImage and all of its content can be
aligned to 4 bytes and U-Boot expects just that.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Reuben Dowle <reuben.dowle@4rf.com>
Cc: Tom Rini <trini@konsulko.com>
Signed-off-by: Marek Vasut <marex@denx.de>