ibm: wspoon-pfault-analysis: Use EXTRA_OEMESON

As this repository now uses meson, the bitbake variable to
pass in options to the build needs to change to the meson one.

Tested: witherspoon-tacoma now uses the correct UCD90160 YAML
file instead of the default example one.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I5662fd7c6b23b51a62a88ae6bd3d6daa0e3637bf
1 file changed