HID: bpf: fix hid_bpf_input_report() when hid-core is not ready

Reported by linux-next:
After merging the hid tree, today's linux-next build (x86_64 allmodconfig)
failed like this:

x86_64-linux-gnu-ld: vmlinux.o: in function `hid_bpf_input_report':
(.text+0x1c75181): undefined reference to `hid_input_report'

Caused by commit 9be50ac3 ("HID: bpf: allow to inject HID event
from BPF")

I just forgot to put the indirection in place.

Link: https://lore.kernel.org/linux-kernel/20240411105131.7830f966@canb.auug.org.au/
Fixes: 9be50ac3 ("HID: bpf: allow to inject HID event from BPF")
Link: https://lore.kernel.org/r/20240411-fix-hid-bpf-v1-1-4ae913031a8c@kernel.orgSigned-off-by: Benjamin Tissoires <bentiss@kernel.org>

drivers/hid/bpf/hid_bpf_dispatch.c

@@ -534,7 +534,7 @@ hid_bpf_input_report(struct hid_bpf_ctx *ctx, enum hid_report_type type, u8 *buf
 
 	hdev = (struct hid_device *)ctx->hid; /* discard const */
 
-	return hid_input_report(hdev, type, buf, size, 0);
+	return hid_bpf_ops->hid_input_report(hdev, type, buf, size, 0);
 }
 __bpf_kfunc_end_defs();