ARMv7: start.S: stay in HYP mode if u-boot is entered in it

The KVM and Xen hypervisors for the Cortex-A15 virtualization
implementation need to be entered in HYP mode. Should the primary
board firmware already enter HYP mode (Calxeda firmware does that),
we should not deliberately drop back to SVC mode.
Since U-boot does not use the MMU, running in HYP mode is just fine.

Signed-off-by: Andre Przywara <andre.przywara@linaro.org>
x86: Fix DRAM bank size init with generic board

The intention of the memory init code is that it should work the same with
CONFIG_SYS_GENERIC_BOARD and without. This is tricky because dram_init()
is called prior to relocation with generic board (matching other archs)
and after relocation without generic board.

Adjust the init sequence so that dram_init() is not called in the generic
board case, which seems like the easiest fix for now. Also ensure that
relocation addresses are still calculated.

Signed-off-by: Simon Glass <sjg@chromium.org>
x86: Allow setup code to manage its own global data

Currently x86 has its own means of managing the global data and board data
(bd_t), and this code resides in start.S. With generic board, we need to
ensure that we leave this alone - i.e. don't clear it as we do on other
archs.

This fixes a problem where the memory init data is cleared which causes
the video driver to operate very slowly.

Signed-off-by: Simon Glass <sjg@chromium.org>
x86: config: Init PCI before SPI

Since the ICH SPI controller uses PCI, we must ensure that PCI is available
before it is inited.

This fixes the current "ICH SPI: Cannot find device" message on boot.

Signed-off-by: Simon Glass <sjg@chromium.org>
Merge branch 'master' of git://git.denx.de/u-boot-arm
Merge branch 'master' of git://git.denx.de/u-boot-x86