[ARM] orion5x: register the crypto device on SOCs that support it

Not all Orion variants do implement the crypto unit.

Signed-off-by: Nicolas Pitre <nico@marvell.com>

arch/arm/mach-orion5x/common.h

@@ -38,7 +38,6 @@ void orion5x_spi_init(void);
 void orion5x_uart0_init(void);
 void orion5x_uart1_init(void);
 void orion5x_xor_init(void);
-int orion5x_crypto_init(void);
 
 /*
  * PCIe/PCI functions.