Fix PlayStation build after 289155@main

[rkirsling]

1124217

Fix PlayStation build after 289155@main
https://bugs.webkit.org/show_bug.cgi?id=286280

Unreviewed build fix.

* Source/WebCore/rendering/RenderBox.cpp:
(WebCore::RenderBox::avoidsFloats const):
RenderMathMLBlock doesn't exist unless ENABLE(MATHML).

Canonical link: https://commits.webkit.org/289168@main

21308a3

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	🛠 win
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	🧪 wpe-wk2	🧪 win-tests
✅ 🧪 webkitperl	🧪 ios-wk2	🧪 api-mac	🧪 api-wpe
	🧪 ios-wk2-wpt	🧪 mac-wk1	🛠 wpe-cairo
	🧪 api-ios	🧪 mac-wk2	✅ 🛠 gtk
	✅ 🛠 vision	🧪 mac-AS-debug-wk2	🧪 gtk-wk2
	✅ 🛠 vision-sim	🧪 mac-wk2-stress	🧪 api-gtk
	🧪 vision-wk2	🧪 mac-intel-wk2	🛠 playstation
✅ 🛠 🧪 unsafe-merge	🛠 tv	🛠 mac-safer-cpp
	🛠 tv-sim
	🛠 watch
	🛠 watch-sim

[webkit-early-warning-system]

EWS run on current version of this PR (hash 21308a3)

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows
🧪 style	⏳ 🛠 ios	🛠 mac	⏳ 🛠 wpe	⏳ 🛠 win
🧪 bindings	🛠 ios-sim	⏳ 🛠 mac-AS-debug	⏳ 🧪 wpe-wk2	⏳ 🧪 win-tests
🧪 webkitperl	🧪 ios-wk2	🧪 api-mac	⏳ 🧪 api-wpe
	🧪 ios-wk2-wpt	🧪 mac-wk1	⏳ 🛠 wpe-cairo
⏳ 🛠 🧪 jsc	🧪 api-ios	🧪 mac-wk2	🛠 gtk
	🛠 vision	⏳ 🧪 mac-AS-debug-wk2	🧪 gtk-wk2
🧪 services	⏳ 🛠 vision-sim	🧪 mac-wk2-stress	🧪 api-gtk
	⏳ 🧪 vision-wk2	🧪 mac-intel-wk2	⏳ 🛠 playstation
	⏳ 🛠 tv	⏳ 🛠 mac-safer-cpp	🛠 jsc-armv7
	⏳ 🛠 tv-sim		🧪 jsc-armv7-tests
	⏳ 🛠 watch
	🛠 watch-sim

[webkit-early-warning-system]

EWS run on current version of this PR (hash 21308a3)

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	🛠 win
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	🧪 wpe-wk2	🧪 win-tests
✅ 🧪 webkitperl	🧪 ios-wk2	🧪 api-mac	🧪 api-wpe
	🧪 ios-wk2-wpt	🧪 mac-wk1	🛠 wpe-cairo
	🧪 api-ios	🧪 mac-wk2	✅ 🛠 gtk
	✅ 🛠 vision	🧪 mac-AS-debug-wk2	🧪 gtk-wk2
	✅ 🛠 vision-sim	🧪 mac-wk2-stress	🧪 api-gtk
	🧪 vision-wk2	🧪 mac-intel-wk2	🛠 playstation
✅ 🛠 🧪 unsafe-merge	🛠 tv	🛠 mac-safer-cpp
	🛠 tv-sim
	🛠 watch
	🛠 watch-sim

[webkit-commit-queue]

Committed 289168@main (1124217): https://commits.webkit.org/289168@main

Reviewed commits have been landed. Closing PR #39307 and removing active labels.