bootconfig: Increase max nodes of bootconfig from 1024 to 8192 for DCC support

The Data Capture and Compare(DCC) is a debugging tool that uses the bootconfig
for configuring the register values during boot-time. Increase the max nodes
supported by bootconfig to cater to the requirements of the Data Capture and
Compare Driver.

Link: https://lore.kernel.org/all/1674536682-18404-1-git-send-email-quic_schowdhu@quicinc.com/

Signed-off-by: Souradeep Chowdhury <quic_schowdhu@quicinc.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>