net: fman: Remove some unused fields in some structure

In "struct muram_info", the 'size' field is unused.
In "struct memac_cfg", the 'fixed_link' field is unused.

Remove them.

Found with cppcheck, unusedStructMember.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Sean Anderson <sean.anderson@seco.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/425222d4f6c584e8316ccb7b2ef415a85c96e455.1712084103.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/freescale/fman/fman_memac.c

@@ -267,7 +267,6 @@ struct memac_cfg {
 	bool reset_on_init;
 	bool pause_ignore;
 	bool promiscuous_mode_enable;
-	struct fixed_phy_status *fixed_link;
 	u16 max_frame_length;
 	u16 pause_quanta;
 	u32 tx_ipg_length;

drivers/net/ethernet/freescale/fman/fman_muram.c

@@ -12,7 +12,6 @@
 struct muram_info {
 	struct gen_pool *pool;
 	void __iomem *vbase;
-	size_t size;
 	phys_addr_t pbase;
 };