hos/mtc: Add FSP WAR and boost HOS booting times

By implementing FSP WAR we can allow HOS to boot in 1600MHz and be able to switch frequency without hanging.

bootloader/hos/hos.c

@@ -745,7 +745,7 @@ int hos_launch(ini_sec_t *cfg)
 	// Flush cache and disable MMU.
 	bpmp_mmu_disable();
 	bpmp_clk_rate_set(BPMP_CLK_NORMAL);
-	minerva_change_freq(FREQ_800);
+	minerva_change_freq(FREQ_1600);
 
 	// emuMMC: Some cards (Sandisk U1), do not like a fast power cycle. Wait min 100ms.
 	sdmmc_storage_init_wait_sd();

bootloader/main.c

@@ -1265,7 +1265,6 @@ void ipl_main()
 
 	// Train DRAM and switch to max frequency.
 	minerva_init();
-	minerva_change_freq(FREQ_1600);
 
 	display_init();