Unify pal/spi/cocoa/IOSurfaceSPI.h and wtf/spi/cocoa/IOSurfaceSPI.h
<rdar://problem/104784976>
Pull request: https://github.com/WebKit/WebKit/pull/9285
Committed 259532@main (226272d257aa): <https://commits.webkit.org/259532@main> Reviewed commits have been landed. Closing PR #9285 and removing active labels.