disable av1_lowbd_inv_txfm2d_add_neon w/gcc-14+

`NEON/AV1LbdInvTxfm2d*` and `*TestVector*` tests fail with some
configurations using `arm-linux-gnueabi`; no issues were seen with
`arm-linux-gnueabihf`. The check is imprecise and relies on the default
value of `__ARM_ARCH` to be less than `7` with the configuration used
with `arm-linux-gnueabi`.

Bug: 528050364
Change-Id: I25e3a3ce4f8f708b222d270b2e81edc1b7685283

av1/common/arm/av1_inv_txfm_neon.c

diff --git a/av1/common/arm/av1_inv_txfm_neon.c b/av1/common/arm/av1_inv_txfm_neon.c
index 0c41b0c..4b8c31f 100644
--- a/av1/common/arm/av1_inv_txfm_neon.c
+++ b/av1/common/arm/av1_inv_txfm_neon.c
@@ -4214,10 +4214,16 @@
 }
 void av1_inv_txfm_add_neon(const tran_low_t *dqcoeff, uint8_t *dst, int stride,
                            const TxfmParam *txfm_param) {
-  const TX_TYPE tx_type = txfm_param->tx_type;
   if (!txfm_param->lossless) {
+    // TODO(bug 528050364): Remove the C fallback after issues with
+    // arm-linux-gnueabi-gcc-14+ are addressed.
+#if defined(__GNUC__) && __GNUC__ >= 14 && defined(__ARM_ARCH) && __ARM_ARCH < 7
+    av1_inv_txfm_add_c(dqcoeff, dst, stride, txfm_param);
+#else
+    const TX_TYPE tx_type = txfm_param->tx_type;
     av1_lowbd_inv_txfm2d_add_neon(dqcoeff, dst, stride, tx_type,
                                   txfm_param->tx_size, txfm_param->eob);
+#endif
   } else {
     av1_inv_txfm_add_c(dqcoeff, dst, stride, txfm_param);
   }

test/av1_inv_txfm2d_test.cc

diff --git a/test/av1_inv_txfm2d_test.cc b/test/av1_inv_txfm2d_test.cc
index c26fe70..86601bf 100644
--- a/test/av1_inv_txfm2d_test.cc
+++ b/test/av1_inv_txfm2d_test.cc
@@ -398,8 +398,15 @@
                                               TX_TYPE tx_type, TX_SIZE tx_size,
                                               int eob);
 
+// TODO(bug 528050364): Enable this test after issues with
+// arm-linux-gnueabi-gcc-14+ are addressed.
+#if defined(__GNUC__) && __GNUC__ >= 14 && defined(__ARM_ARCH) && __ARM_ARCH < 7
+INSTANTIATE_TEST_SUITE_P(DISABLED_NEON, AV1LbdInvTxfm2d,
+                         ::testing::Values(av1_lowbd_inv_txfm2d_add_neon));
+#else
 INSTANTIATE_TEST_SUITE_P(NEON, AV1LbdInvTxfm2d,
                          ::testing::Values(av1_lowbd_inv_txfm2d_add_neon));
+#endif
 #endif  // HAVE_NEON
 
 }  // namespace