drm/xe/oa: Don't use hardcoded values

The current implementation uses hardcoded values instead of common defines.

v2:
 - Make the commit a regular commit instead of a fixup commit
 - slightly modify commit message
Signed-off-by: Ohad Sharabi <osharabi@habana.ai>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240721071335.101234-1-osharabi@habana.ai

drivers/gpu/drm/xe/xe_oa.c

@@ -641,7 +641,7 @@ static void xe_oa_store_flex(struct xe_oa_stream *stream, struct xe_lrc *lrc,
 	u32 offset = xe_bo_ggtt_addr(lrc->bo);
 
 	do {
-		bb->cs[bb->len++] = MI_STORE_DATA_IMM | BIT(22) /* GGTT */ | 2;
+		bb->cs[bb->len++] = MI_STORE_DATA_IMM | MI_SDI_GGTT | MI_SDI_NUM_DW(1);
 		bb->cs[bb->len++] = offset + flex->offset * sizeof(u32);
 		bb->cs[bb->len++] = 0;
 		bb->cs[bb->len++] = flex->value;