Remove fdt_high and initrd_high for Starfive

Fix checkpatch warning about u-boot/include/configs/starfive-vic7100.h:
```
    ERROR: fdt or initrd relocation disabled at boot time
    +       "fdt_high=0xffffffffffffffff\0" \
    
    ERROR: fdt or initrd relocation disabled at boot time
    +       "initrd_high=0xffffffffffffffff\0" \
```
Further discussion of why this is not needed and the problem its presence was causing in issue #19

include/configs/starfive-vic7100.h

@@ -108,8 +108,6 @@
 	"name=system,size=-,bootable,type=${type_guid_gpt_system};"
 
 #define CONFIG_EXTRA_ENV_SETTINGS \
-	"fdt_high=0xffffffffffffffff\0" \
-	"initrd_high=0xffffffffffffffff\0" \
 	"kernel_addr_r=0x84000000\0" \
 	"fdt_addr_r=0x88000000\0" \
 	"scriptaddr=0x88100000\0" \