yuzu (Qt) currently needs SDL for input

--- CMakeLists.txt.orig	2021-08-14 09:28:59 UTC
+++ CMakeLists.txt
@@ -395,7 +395,10 @@ if (ENABLE_SDL2)
         target_include_directories(SDL2 INTERFACE "${SDL2_INCLUDE_DIR}")
     elseif (YUZU_USE_EXTERNAL_SDL2)
         message(STATUS "Using SDL2 from externals.")
-    else()
+    endif()
+endif()
+
+if (NOT YUZU_USE_BUNDLED_SDL2 AND NOT YUZU_USE_EXTERNAL_SDL2)
         find_package(SDL2 2.0.16 REQUIRED)
 
         # Some installations don't set SDL2_LIBRARIES
@@ -407,7 +410,6 @@ if (ENABLE_SDL2)
         include_directories(SYSTEM ${SDL2_INCLUDE_DIRS})
         add_library(SDL2 INTERFACE)
         target_link_libraries(SDL2 INTERFACE "${SDL2_LIBRARIES}")
-    endif()
 endif()
 
 # Install any missing dependencies with conan install
--- src/input_common/CMakeLists.txt.orig	2021-04-21 21:36:33 UTC
+++ src/input_common/CMakeLists.txt
@@ -62,7 +62,7 @@ else()
     )
 endif()
 
-if (ENABLE_SDL2)
+if (SDL2_FOUND)
     target_sources(input_common PRIVATE
         sdl/sdl_impl.cpp
         sdl/sdl_impl.h