Don't force packing of objd/objectlist stucts

objd/objectlist don't map to any EtheCAT protocol
headers, hence they don't need to be packed.

Pro and conns for packing or not.

Packed structs give optimized smaller size of ObjectDictionary.

Unpacked structs give optimized performance when iterating and
accessing processdata pointers.

Unpacked give more toolchain portable code.

soes/esc_coe.h

@@ -13,8 +13,8 @@
 
 #include <cc.h>
 
-CC_PACKED_BEGIN
-typedef struct CC_PACKED
+
+typedef struct
 {
    uint16_t subindex;
    uint16_t datatype;
@@ -24,10 +24,9 @@ typedef struct CC_PACKED
    uint32_t value;
    void *data;
 } _objd;
-CC_PACKED_END
 
-CC_PACKED_BEGIN
-typedef struct CC_PACKED
+
+typedef struct
 {
    uint16_t index;
    uint16_t objtype;
@@ -36,7 +35,7 @@ typedef struct CC_PACKED
    const char *name;
    const _objd *objdesc;
 } _objectlist;
-CC_PACKED_END
+
 
 typedef struct
 {