net/i40e/base: add trace buffer reading dependencies

Some driver versions need to use "Read alternate - Indirect" command
in order to get the content of trace buffer. This patch adds a couple of
defines related to that functionality.

Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

drivers/net/i40e/base/i40e_type.h

@@ -1910,6 +1910,10 @@ struct i40e_lldp_variables {
 #define I40E_ALT_BW_RELATIVE_MASK	0x40000000
 #define I40E_ALT_BW_VALID_MASK		0x80000000
 
+/* Alternate Ram Trace Buffer*/
+#define I40E_ALT_CANARY			0xABCDEFAB
+#define I40E_ALT_BUFF_DWORD_SIZE	0x14 /* in dwords */
+
 /* RSS Hash Table Size */
 #define I40E_PFQF_CTL_0_HASHLUTSIZE_512	0x00010000