radeonsi: num_records is in units of stride for swizzled buffers even on VI

The old setting didn't hurt, but this is cleaner.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index 5dfbd66..6f0f414 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -5872,8 +5872,6 @@
 			assert(stride < (1 << 14));
 
 			num_records = 64;
-			if (ctx->screen->b.chip_class >= VI)
-				num_records *= stride;
 
 			ring = LLVMBuildBitCast(builder, base_ring, v2i64, "");
 			tmp = LLVMBuildExtractElement(builder, ring, uint->zero, "");