[BNX2]: Add firmware decompression

Add functions to decompress firmware before loading to the internal
CPUs. Compressing the firmware reduces the driver size significantly.

Added file name length sanity check in the gzip header to prevent
going past the end of buffer [suggested by DaveM].

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index ea1ab06..cc36b75 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -4051,6 +4051,9 @@
 	u32			flash_size;
 
 	int			status_stats_size;
+
+	struct z_stream_s	*strm;
+	void			*gunzip_buf;
 };
 
 static u32 bnx2_reg_rd_ind(struct bnx2 *bp, u32 offset);