defconfig: arm64: Enable DEBUG_SECTION_MISMATCH on sdm855

config DEBUG_SECTION_MISMATCH flag does the section
mismatch analysis checks if there are illegal
references from one section to another section.
And disable config SECTION_MISMATCH_WARN_ONLY flag,
so that build process will fail there are any section
mismatch instead of just throwing warnings.

Change-Id: I740c55e3e59ead0dc9cfadf4be5ece45eb84dd22
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>