emit_spirv: Workaround VK_KHR_shader_float_controls on fp16 Nvidia

Fix regression on Fire Emblem: Three Houses when using native fp16.

src/shader_recompiler/profile.h

@@ -58,6 +58,8 @@ struct Profile {
     bool has_broken_unsigned_image_offsets{};
     /// Signed instructions with unsigned data types are misinterpreted
     bool has_broken_signed_operations{};
+    /// Float controls break when fp16 is enabled
+    bool has_broken_fp16_float_controls{};
     /// Dynamic vec4 indexing is broken on some OpenGL drivers
     bool has_gl_component_indexing_bug{};
     /// The precise type qualifier is broken in the fragment stage of some drivers