libie: fix string names for AQ error codes

The LIBIE_AQ_STR macro() introduced by commit 5feaa7a ("libie: add
adminq helper for converting err to str") is used in order to generate
strings for printing human readable error codes. Its definition is missing
the separating underscore ('_') character which makes the resulting strings
difficult to read. Additionally, the string won't match the source code,
preventing search tools from working properly.

Add the missing underscore character, fixing the error string names.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Fixes: 5feaa7a ("libie: add adminq helper for converting err to str")
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Link: https://patch.msgid.link/20250923205657.846759-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: jacob-keller

drivers/net/ethernet/intel/libie/adminq.c

@@ -6,7 +6,7 @@
 
 static const char * const libie_aq_str_arr[] = {
 #define LIBIE_AQ_STR(x)					\
-	[LIBIE_AQ_RC_##x]	= "LIBIE_AQ_RC" #x
+	[LIBIE_AQ_RC_##x]	= "LIBIE_AQ_RC_" #x
 	LIBIE_AQ_STR(OK),
 	LIBIE_AQ_STR(EPERM),
 	LIBIE_AQ_STR(ENOENT),