Revert "sunxi: dram: Use divisor P=1 for PLL5"

This change breaks various hardcoded assumptions in the linux-sunxi-3.4
kernels, causing a divide by 0 error in the linux-sunxi-3.4 nand driver,
rendering 3.4 kernels unbootable. Besides this problem, it also breaks LCD
output (on devices without nand).

Fixes for these issues are being added to the linux-sunxi-3.4 kernel, but for
now it seems better to revert this.

This reverts commit 013f2d746955147439215a4939655c9ed6bdd866.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
ARM: bootm: Allow booting in secure mode on hyp capable systems

Older Linux kernels will not properly boot in hype mode, add support for a
bootm_boot_mode environment variable, which when set to "sec" will cause
u-boot to boot in secure mode even when build with non-sec (and hyp) support.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>