[PATCH v2 1/2] Drivers: hv: vmbus: fix typo "substract" in comment

Correct "substract" to "subtract", reported by scripts/checkpatch.pl using
the misspelling list in scripts/spelling.txt.  Only touches a comment, no
code changes.

The subject prefix changed since v1, from "hv:" to "Drivers: hv: vmbus:",
for consistency with the rest of the subsystem's history as Michael Kelley
pointed out.

Assisted-by: Cursor:claude-opus-5
Reviewed-by: Michael Kelley <redacted>
Signed-off-by: Hemanth Selam <redacted>
---
 drivers/hv/channel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index f4370617deac..c36ec14529b9 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c

@@ -79,7 +79,7 @@ static inline u32 hv_ring_gpadl_send_hvpgoffset(u32 offset)
 	 * therefore leaving a (PAGE_SIZE - HV_HYP_PAGE_SIZE) gap.
 	 *
 	 * And to calculate the effective send offset in gpadl, we need to
-	 * substract this gap.
+	 * subtract this gap.
 	 */
 	return (offset - (PAGE_SIZE - HV_HYP_PAGE_SIZE)) >> HV_HYP_PAGE_SHIFT;
 }