[PATCH] Bluetooth: hci: Represent advertising report payloads as bytes

[Kyle Pepper <cochcoder@proton.me>]

Advertising records have variable-length data and cannot form a C
array of flexible structures. Describe the report payloads as bytes
to avoid Sparse warnings without changing their wire layout.

Assisted-by: OpenCode:gpt-6.1-sol sparse
Signed-off-by: Kyle Pepper <cochcoder@proton.me>
---
Separate cleanup of warnings inherited from upstream, not a v2 of the
UB500 shared-buffer RFC. The same two "array of flexible structures"
warnings reproduce on that RFC's parent and exact submitted commit.
The public bot report only contains the matching include-file note;
its complete Sparse output was not available.

Testing:
- GCC W=1 C=2: hci_event.o and btusb_main.o, no diagnostics after cleanup.
- Exact submitted UB500 commit plus this cleanup: same clean checks.
- Strict GCC/Clang layout checks and LLVM/32-bit hci_event.o builds pass.
- GCC hci_event .text section is byte-identical before/after cleanup.
- A guest carrying the cleanup passes pairing and both HoG variants
  on baseline BlueZ and each of four independent ASHA topics: 15/15.

This does not change the UB500 quirk or certify an unseen complete
remote Sparse report. No full architecture/configuration build matrix
or physical hearing-aid regression test is claimed.

 include/net/bluetooth/hci.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 1641d879d..e873ffc15 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -2972,7 +2972,7 @@ struct hci_ev_le_advertising_info {
 
 struct hci_ev_le_advertising_report {
 	__u8    num;
-	struct hci_ev_le_advertising_info info[];
+	__u8    data[];
 } __packed;
 
 #define HCI_EV_LE_CONN_UPDATE_COMPLETE	0x03
@@ -3058,7 +3058,7 @@ struct hci_ev_le_ext_adv_info {
 
 struct hci_ev_le_ext_adv_report {
 	__u8     num;
-	struct hci_ev_le_ext_adv_info info[];
+	__u8     data[];
 } __packed;
 
 #define HCI_EV_LE_PA_SYNC_ESTABLISHED	0x0e

base-commit: 609a23989d637e2f90522a37c62e65c8c9b8b0ff