kconfig: rename E_OR & friends to avoid name clash

We had macros named the same as a set of enumeration values.
It is legal code but very confusing to read - so rename
the macros from E_* to EXPR_*

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
diff --git a/scripts/kconfig/expr.c b/scripts/kconfig/expr.c
index 6f98dbf..c8793d1 100644
--- a/scripts/kconfig/expr.c
+++ b/scripts/kconfig/expr.c
@@ -955,14 +955,14 @@
 	case E_AND:
 		val1 = expr_calc_value(e->left.expr);
 		val2 = expr_calc_value(e->right.expr);
-		return E_AND(val1, val2);
+		return EXPR_AND(val1, val2);
 	case E_OR:
 		val1 = expr_calc_value(e->left.expr);
 		val2 = expr_calc_value(e->right.expr);
-		return E_OR(val1, val2);
+		return EXPR_OR(val1, val2);
 	case E_NOT:
 		val1 = expr_calc_value(e->left.expr);
-		return E_NOT(val1);
+		return EXPR_NOT(val1);
 	case E_EQUAL:
 		sym_calc_value(e->left.sym);
 		sym_calc_value(e->right.sym);