payloads/tianocore: use BMP (vs SVG) logo file as default

converting the SVG logo to BMP at compile time using 'convert'
introduces terrible aliasing artifacts, so use a properly converted
BMP file as the default instead.

Test: boot qemu w/Tianocore, observe lack of aliasing in coreboot logo

Change-Id: I62d643c24abca57fa35b79732d8cedc83b94815f
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66144
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/payloads/external/tianocore/Kconfig b/payloads/external/tianocore/Kconfig
index 9323666..9faa1aa 100644
--- a/payloads/external/tianocore/Kconfig
+++ b/payloads/external/tianocore/Kconfig
@@ -94,7 +94,7 @@
 
 config TIANOCORE_BOOTSPLASH_FILE
 	string "Tianocore Bootsplash path and filename"
-	default "Documentation/coreboot_logo.svg"
+	default "Documentation/coreboot_logo.bmp"
 	help
 	  The path and filename of the file to use as graphical bootsplash
 	  image. If this option is not configured, the default