remove mips and powerpc ioctls that are missing from linux uapi

mips and powerpc use their own asm/ioctls.h, not the asm-generic/ioctls.h
and they lack termiox macros that are available on other targets.
see kernel commit 1d65b4a088de407e99714fdc27862449db04fb5c

arch/mips/bits/ioctl.h

@@ -89,11 +89,6 @@
 #define TIOCMIWAIT	0x5491
 #define TIOCGICOUNT	0x5492
 
-#define TCGETX		0x5432          // RICH: Not sure about these.
-#define TCSETX		0x5433          // RICH: Not sure about these.
-#define TCSETXF		0x5434          // RICH: Not sure about these.
-#define TCSETXW		0x5435          // RICH: Not sure about these.
-
 #define TIOCPKT_DATA		 0
 #define TIOCPKT_FLUSHREAD	 1
 #define TIOCPKT_FLUSHWRITE	 2

arch/mips64/bits/ioctl.h

@@ -89,11 +89,6 @@
 #define TIOCMIWAIT	0x5491
 #define TIOCGICOUNT	0x5492
 
-#define TCGETX		0x5432
-#define TCSETX		0x5433
-#define TCSETXF		0x5434
-#define TCSETXW		0x5435
-
 #define TIOCPKT_DATA		 0
 #define TIOCPKT_FLUSHREAD	 1
 #define TIOCPKT_FLUSHWRITE	 2

arch/mipsn32/bits/ioctl.h

@@ -89,11 +89,6 @@
 #define TIOCMIWAIT	0x5491
 #define TIOCGICOUNT	0x5492
 
-#define TCGETX		0x5432
-#define TCSETX		0x5433
-#define TCSETXF		0x5434
-#define TCSETXW		0x5435
-
 #define TIOCPKT_DATA		 0
 #define TIOCPKT_FLUSHREAD	 1
 #define TIOCPKT_FLUSHWRITE	 2

arch/powerpc/bits/ioctl.h

@@ -120,14 +120,6 @@
 #define TIOCGICOUNT	0x545D
 
 
-/* end kernel header ioctls.h */
-
-
-#define TCGETX		0x5432
-#define TCSETX		0x5433
-#define TCSETXF		0x5434
-#define TCSETXW		0x5435
-
 struct winsize {
 	unsigned short ws_row;
 	unsigned short ws_col;

arch/powerpc64/bits/ioctl.h

@@ -120,14 +120,6 @@
 #define TIOCGICOUNT	0x545D
 
 
-/* end kernel header ioctls.h */
-
-
-#define TCGETX		0x5432
-#define TCSETX		0x5433
-#define TCSETXF		0x5434
-#define TCSETXW		0x5435
-
 struct winsize {
 	unsigned short ws_row;
 	unsigned short ws_col;