USB2NET : SR9800 : change SR9800_BULKIN_SIZE from global to static

Smatch reports this issue
sr9800.h:166:53: warning: symbol 'SR9800_BULKIN_SIZE' was not declared. Should it be static?

Global variables should not be defined in header files.
This only works because sr9800.h in only included by sr9800.c
Change the storage-class specifier to static.
And since it does not change add type qualifier const.

Signed-off-by: Tom Rix <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/usb/sr9800.h

···
 #define SR9800_MAX_BULKIN_24K		6
 #define SR9800_MAX_BULKIN_32K		7
 
-struct {unsigned short size, byte_cnt, threshold; } SR9800_BULKIN_SIZE[] = {
+static const struct {unsigned short size, byte_cnt, threshold; } SR9800_BULKIN_SIZE[] = {
 	/* 2k */
 	{2048, 0x8000, 0x8001},
 	/* 4k */