nyx: Add alternate power saving modes

T210:
By default max power savings is enabled.
By changing `newpowersave=` to 0, it reverts to the old behavior of smaller power savings.

This was added to mitigate some strange DRAM chips, hanging from constant frequency change of a 800 MHz - 1600 MHz back and forth.

T210B01:
Defaults to a simple loop with no power savings. That's because of untrained ram.

nyx/nyx_gui/config.h

@@ -51,6 +51,7 @@ typedef struct _nyx_config
 	u32 verification;
 	u32 ums_emmc_rw;
 	u32 jc_disable;
+	u32 new_powersave;
 } nyx_config;
 
 void set_default_configuration();