* Fix ARM NEON code compilation
Fix LV_HAVE_NEON defintion incorrecly used instead of HAVE_NEON in some places
Replace vqabsq_s32 with vabsq_f32 as vqabsq_s32 requires int type (fails to compile)
Fix missing NEON code path in mat.h in srslte_mat_2x2_mmse_csi_simd()
* Fix timestamp overflow issue on 32-bit systems with Soapy driver
'time_t secs' can be 32-bit on some systems. This causes calculation:
'secs * 1000000000;' to overflow.