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 <paul@crapouillou.net>
Reviewed-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Reviewed-by: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Maarten ter Huurne <maarten@treewalker.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/18485/Signed-off-by: James Hogan <jhogan@kernel.org>

arch/mips/include/asm/bootinfo.h

@@ -79,6 +79,8 @@ enum loongson_machine_type {
  */
 #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);