MIPS: platform: add machtype IDs for more Ingenic SoCs

Add a machtype ID for the JZ4780 SoC, which was missing, and one for the
newly supported JZ4770 SoC.

Signed-off-by: Paul Cercueil <[e-mail]>
Reviewed-by: PrasannaKumar Muralidharan <[e-mail]>
Reviewed-by: James Hogan <[e-mail]>
Cc: Ralf Baechle <[e-mail]>
Cc: Maarten ter Huurne <[e-mail]>
Cc: [e-mail]
Patchwork: https://patchwork.linux-mips.org/patch/18485/
Signed-off-by: James Hogan <[e-mail]>

arch/mips/include/asm/bootinfo.h

···
  */
 #define  MACH_INGENIC_JZ4730	0	/* JZ4730 SOC		*/
 #define  MACH_INGENIC_JZ4740	1	/* JZ4740 SOC		*/
+#define  MACH_INGENIC_JZ4770	2	/* JZ4770 SOC		*/
+#define  MACH_INGENIC_JZ4780	3	/* JZ4780 SOC		*/
 
 extern char *system_type;
 const char *get_system_type(void);