Revert "drm/amd/display: add -msse2 to prevent Clang from emitting libcalls to undefined SW FP routines"

This reverts commit 10117450.

Causes a crash.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=109487Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 4.19