Fix ZA tile slice indices in ssyrk SME direct kernel#5874
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The kernel_2x2 function uses 4 ZA tiles (0-3) each with svl slices. Tiles 0/1 handle rows 0..svl-1 with slice indices 0..svl-1. Tiles 2/3 handle rows svl..2*svl-1, so their slice indices must start at 0, i.e. (i - svl) instead of i. Fix all three tile 2/3 access sites: - C load into ZA (svwrite_hor_za32_f32_m) - C writeback for UPPER (svst1_hor_za32) - C writeback for LOWER (svst1_hor_za32) Fixes OpenMathLib#5873
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The kernel_2x2 function uses 4 ZA tiles (0-3) each with svl slices. Tiles 0/1 handle rows 0..svl-1 with slice indices 0..svl-1. Tiles 2/3 handle rows svl..2*svl-1, so their slice indices must start at 0, i.e. (i - svl) instead of i.
Fix all three tile 2/3 access sites:
Fixes #5873