kconfig: fix -Wmisleading-indentation

Fixes:
scripts/kconfig/symbol.c:1153:4: warning: misleading indentation;
statement is not part of the previous 'if' [-Wmisleading-indentation]
fprintf(stderr, "For a resolution refer to Documentation/kbuild/kconfig-language.txt\n");
^
scripts/kconfig/symbol.c:1150:3: note: previous statement is here
if (stack->sym == last_sym)
^

This code has been significantly rewritten upstream, it's not worth
backporting IMO.

Bug: 155426751
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Change-Id: I22f8317f7b92f59a9bd810593cbf3aacb4b73c5e