Remote Bios Configuration:Increasing buffer size.

Increasing the KCS buffersize to receive 4K bytes of data
from BIOS.

Tested:By giving SetPayload command we are able to get and set
4096 bytes of data between BIOS and BMC.

Signed-off-by: Rashmi RV <rashmi.r.v@linux.intel.com>
Change-Id: I6fa418ea84a216b30430bbd94b50d5faefe12a1f
diff --git a/kcsbridged.cpp b/kcsbridged.cpp
index a37cf5f..2110f3e 100644
--- a/kcsbridged.cpp
+++ b/kcsbridged.cpp
@@ -78,7 +78,7 @@
 class SmsChannel
 {
   public:
-    static constexpr size_t kcsMessageSize = 256;
+    static constexpr size_t kcsMessageSize = 4096;
     static constexpr uint8_t netFnShift = 2;
     static constexpr uint8_t lunMask = (1 << netFnShift) - 1;