Don't add afalg engine if configured "no-engine"

Also, indent a little deeper, for clarity.
Reviewed-by: NMatt Caswell <matt@openssl.org>

engines/afalg/build.info

 {- use File::Spec::Functions qw/:DEFAULT rel2abs/; -}
 
-IF[{- !$disabled{afalg} -}]
- IF[{- $disabled{"dynamic-engine"} -}]
-  LIBS=../../libcrypto
-  SOURCE[../../libcrypto]=e_afalg.c e_afalg_err.c
- ELSE
-  ENGINES=afalg
-  SOURCE[afalg]=e_afalg.c e_afalg_err.c
-  DEPEND[afalg]=../../libcrypto
-  INCLUDE[afalg]= {- rel2abs(catdir($builddir,"../../include")) -} ../../include
- ENDIF
+IF[{- !$disabled{"engine"} -}]
+  IF[{- !$disabled{afalg} -}]
+    IF[{- $disabled{"dynamic-engine"} -}]
+      LIBS=../../libcrypto
+      SOURCE[../../libcrypto]=e_afalg.c e_afalg_err.c
+    ELSE
+      ENGINES=afalg
+      SOURCE[afalg]=e_afalg.c e_afalg_err.c
+      DEPEND[afalg]=../../libcrypto
+      INCLUDE[afalg]= {- rel2abs(catdir($builddir,"../../include")) -} ../../include
+    ENDIF
+  ENDIF
 ENDIF