qemu: switch to '-vga std' emulated hardware from vmware/cirrus for x86/mips

This is the qemu default since qemu 2.2, is generally supported better,
and is recommended by upstream. It also has already been in use for arm/risc
and ovmf.

Additional information:
https://bugzilla.yoctoproject.org/show_bug.cgi?id=13466
https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-harmful/

'-vga virtio' emulated hardware remains in use when virgl is enabled via a runqemu override.

Also, adjust the error whitelist, as there is a number of new messages
coming from the drivers that are not actual errors.

(From OE-Core rev: 73cb104f3307736f4922f2e0c9648f9b2d3b3b6b)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/runqemu

@@ -145,8 +145,6 @@ class BaseConfig(object):
         # to be added with -drive if=pflash.
         # Found in the same places as the rootfs, with or without one of
         # these suffices: qcow2, bin.
-        # Setting one also adds "-vga std" because that is all that
-        # OVMF supports.
         self.ovmf_bios = []
         # When enrolling default Secure Boot keys, the hypervisor
         # must provide the Platform Key and the first Key Exchange Key
@@ -1283,10 +1281,6 @@ class BaseConfig(object):
         for ovmf in self.ovmf_bios:
             format = ovmf.rsplit('.', 1)[-1]
             self.qemu_opt += ' -drive if=pflash,format=%s,file=%s' % (format, ovmf)
-        if self.ovmf_bios:
-            # OVMF only supports normal VGA, i.e. we need to override a -vga vmware
-            # that gets added for example for normal qemux86.
-            self.qemu_opt += ' -vga std'
 
         self.qemu_opt += ' ' + self.qemu_opt_script