MIPS: Alchemy: Update cpu-feature-overrides

#define cpu_has_4k_cache		1

#define cpu_has_tx39_cache		0

#define cpu_has_fpu			0

#define cpu_has_32fpr			0

#define cpu_has_counter			1

#define cpu_has_watch			1

#define cpu_has_divec			1

#define cpu_has_vce			0

#define cpu_has_cache_cdex_p		0

#define cpu_has_cache_cdex_s		0

#define cpu_has_prefetch		1

#define cpu_has_mcheck			1

#define cpu_has_ejtag			1

#define cpu_has_llsc			1

#define cpu_has_vtag_icache		0

#define cpu_has_dc_aliases		0

#define cpu_has_ic_fills_f_dc		1

#define cpu_has_pindexed_dcache		0

#define cpu_has_mips32r1		1

#define cpu_has_mips32r2		0

#define cpu_has_mips64r1		0