package/uhd: drop have_mfpu_neon

Drop have_mfpu_neon which has been added by commit
b07de37540ee34e4e5fa8586ecc40da1586cd940 but is not recognized:

CMake Warning:
  Manually-specified variables were not used by the project:

    BUILD_DOC
    BUILD_DOCS
    BUILD_EXAMPLE
    BUILD_EXAMPLES
    BUILD_TEST
    BUILD_TESTING
    BUILD_TESTS
    CMAKE_INSTALL_RUNSTATEDIR
    have_mfpu_neon

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/uhd/uhd.mk

@@ -36,7 +36,6 @@ ifeq ($(BR2_ARM_CPU_HAS_NEON),y)
 UHD_CONF_OPTS += -DCMAKE_CXX_FLAGS="$(TARGET_CXXFLAGS) -mfpu=neon"
 UHD_CONF_OPTS += -DNEON_SIMD_ENABLE=ON
 else
-UHD_CONF_OPTS += -Dhave_mfpu_neon=0
 UHD_CONF_OPTS += -DNEON_SIMD_ENABLE=OFF
 endif