net: fs_enet: Remove stale prototypes from fsl_soc.c

Commit 3dd82a1e ("[POWERPC] CPM: Always use new binding.")
removed last use of init_fec_ioports() and init_fcc_ioports().

Remove stale prototypes then don't include anymore fs_enet_pd.h
which was only included to provide fs_platform_info structure
for the prototypes.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/f2f2db5dce3242eaa4a2aad6c226ba587fb0f513.1691155347.git.christophe.leroy@csgroup.euSigned-off-by: Jakub Kicinski <kuba@kernel.org>

arch/powerpc/sysdev/fsl_soc.c

@@ -23,7 +23,6 @@
 #include <linux/phy.h>
 #include <linux/spi/spi.h>
 #include <linux/fsl_devices.h>
-#include <linux/fs_enet_pd.h>
 #include <linux/fs_uart_pd.h>
 #include <linux/reboot.h>
 
@@ -37,8 +36,6 @@
 #include <asm/cpm2.h>
 #include <asm/fsl_hcalls.h>	/* For the Freescale hypervisor */
 
-extern void init_fcc_ioports(struct fs_platform_info*);
-extern void init_fec_ioports(struct fs_platform_info*);
 extern void init_smc_ioports(struct fs_uart_platform_info*);
 static phys_addr_t immrbase = -1;