sys: vt_efifb: EFI not supported on i386; move it back to amd64/NOTES

We do not support EFI boot on i386.  Thus:
1. Move (back) 'device vt_efifb' from x86/NOTES to amd64/NOTES.
2. Remove 'device vt_efifb' from i386/MINIMAL.

Reported by:    jhb
Fixes:          f224591746 ("Add ASMC_DEBUG make option")
Fixes:          67599eef01 ("sys/x86/NOTES: Add vt_efifb")
Sponsored by:   The FreeBSD Foundation

sys/amd64/conf/NOTES

@@ -43,6 +43,9 @@ cpu		HAMMER			# aka K8, aka Opteron & Athlon64
 # Optional devices:
 #
 
+# vt(4) drivers.
+device		vt_efifb	# EFI framebuffer
+
 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support.  This will create
 # the /dev/3dfx0 device to work with glide implementations.  This should get
 # linked to /dev/3dfx and /dev/voodoo.  Note that this is not the same as

sys/i386/conf/MINIMAL

@@ -114,7 +114,6 @@ options 	SC_PIXEL_MODE		# add support for the raster text mode
 # vt is the default video console driver
 device		vt
 device		vt_vga
-device		vt_efifb
 device		vt_vbefb
 
 device		agp			# support several AGP chipsets

sys/x86/conf/NOTES

@@ -329,7 +329,6 @@ options 	VGA_DEBUG
 # vt(4) drivers.
 device		vt_vga		# VGA
 device		vt_vbefb	# VBE framebuffer
-device		vt_efifb        # EFI framebuffer
 
 # Linear framebuffer driver for S3 VESA 1.2 cards. Works on top of VESA.
 device		s3pci