cmake: Fix locating libusb header at configure-time

Removing the CheckUSBHID call is necessary to avoid caching the failed header
check result before we find libusb via pkg-config.

cmake/sdlchecks.cmake

@@ -1074,7 +1074,7 @@ macro(CheckHIDAPI)
       set(HAVE_HIDAPI FALSE)
       pkg_check_modules(LIBUSB libusb)
       if (LIBUSB_FOUND)
-        check_include_file(libusb.h HAVE_LIBUSB_H)
+        check_include_file(libusb.h HAVE_LIBUSB_H ${LIBUSB_CFLAGS})
         if (HAVE_LIBUSB_H)
           set(HAVE_HIDAPI TRUE)
         endif()