scripts: checkpatch: False alarm warning for macros.

Remove false alarm warning of
`braces {} are required around if/while/for/else`
for macro definitions with if/while/for/else.

Signed-off-by: Vignesh Pandian <vignesh@aerlync.com>

scripts/checkpatch.pl

@@ -5560,7 +5560,42 @@ sub process {
 			$block =~ tr/\x1C//d;
 			#print sprintf '%v02X', $block;
 			#print "\n";
-			if ($level == 0 && $block !~ /^\s*\{/ && !$allowed) {
+
+			# Detect if the line is part of a macro
+			my $is_macro = 0;
+
+			# Check if the current line is a single-line macro
+			if ($lines[$linenr] =~ /^\+\s*#\s*define\b/) {
+				$is_macro = 1;
+			} else {
+				# Dynamically check upward for multi-line macro
+				my $i = $linenr - 1;
+				while ($i >= 0) {
+					my $line = $lines[$i];
+					last unless defined $line;
+
+					# Stop at non-added/context lines
+					last if $line !~ /^[ +]/;
+
+					# If this is a macro definition line, we're inside a macro
+					if ($line =~ /^\+\s*#\s*define\b/) {
+						$is_macro = 1;
+						last;
+					}
+
+					# Check if previous line ends with backslash (i.e., continuation)
+					if ($i > 0) {
+						my $prev_line = $lines[$i - 1];
+						last if !defined($prev_line) || $prev_line !~ /\\\s*$/;
+					} else {
+						last;
+					}
+
+					$i--;
+				}
+			}
+
+			if ($level == 0 && $block !~ /^\s*\{/ && !$allowed && !$is_macro) {
 				my $cnt = statement_rawlines($block);
 				my $herectx = get_stat_here($linenr, $cnt, $here);