nvme: There's 64 LBAF descriptors, not 16

Older versions of the standard were limited to 16, but the actual limit
is 64. Bump the limit to 64. This should be a #define, but there's no
good standardized name, so I'm punting on that. All the places that use
it, apart from the byte swapping code, do the right thing and use the
nlbaf field to limit what to access.

Sponsored by:		Netflix

Author: bsdimp

sys/dev/nvme/nvme.h

@@ -1507,9 +1507,7 @@ struct nvme_namespace_data {
 	uint8_t			eui64[8];
 
 	/** lba format support */
-	uint32_t		lbaf[16];
-
-	uint8_t			reserved7[192];
+	uint32_t		lbaf[64];
 
 	uint8_t			vendor_specific[3712];
 } __packed __aligned(4);
@@ -2175,7 +2173,7 @@ void	nvme_namespace_data_swapbytes(struct nvme_namespace_data *s __unused)
 	s->anagrpid = le32toh(s->anagrpid);
 	s->nvmsetid = le16toh(s->nvmsetid);
 	s->endgid = le16toh(s->endgid);
-	for (i = 0; i < 16; i++)
+	for (i = 0; i < 64; i++)
 		s->lbaf[i] = le32toh(s->lbaf[i]);
 #endif
 }