printk: increase log buffer size to 2k

Kernel command line print statement is truncated, need increase the
buffer size.

Change-Id: I0e353563a138e85de2fb84ca89074e564337967a
Signed-off-by: Konstantin Makariev <hcv867@motorola.com>
Reviewed-on: https://gerrit.mot.com/1189541
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Konstantin Makariev <kmakariev@motorola.com>
Submit-Approved: Jira Key
Reviewed-on: https://gerrit.mot.com/1252557
Reviewed-by: Huosheng Liao <liaohs@motorola.com>
Reviewed-on: https://gerrit.mot.com/1461482
Reviewed-by: Zhenxin Xi <xizx@motorola.com>
Reviewed-on: https://gerrit.mot.com/1509722

kernel/printk/printk.c

@@ -430,7 +430,7 @@ static u64 clear_seq;
 static u32 clear_idx;
 
 #define PREFIX_MAX		32
-#define LOG_LINE_MAX		(1024 - PREFIX_MAX)
+#define LOG_LINE_MAX		(3072 - PREFIX_MAX)
 
 #define LOG_LEVEL(v)		((v) & 0x07)
 #define LOG_FACILITY(v)		((v) >> 3 & 0xff)