LynxOS is no longer supported

LynxOS needed the do_bootm_lynxkdi() function that got removed in
7e713067 ("Remove LYNX KDI remainders") - and that function needed
a lynxkdi_boot() function, where the last implementation had been
removed in 98f705c9 ("powerpc: remove 4xx support") already. Looks
like this OS is definitely not supported anymore, so remove it from
the corresponding lists.
Signed-off-by: NThomas Huth <thuth@redhat.com>
Reviewed-by: NStefan Roese <sr@denx.de>

README

@@ -2912,8 +2912,7 @@ details; basically, the header defines the following image properties:
 * Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD,
   4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks,
   LynxOS, pSOS, QNX, RTEMS, INTEGRITY;
-  Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS,
-  INTEGRITY).
+  Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, INTEGRITY).
 * Target CPU Architecture (Provisions for Alpha, ARM, Intel x86,
   IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
   Currently supported: ARM, Intel x86, MIPS, NDS32, Nios II, PowerPC).

boot/image.c

@@ -102,9 +102,6 @@ static const table_entry_t uimage_os[] = {
 	{	IH_OS_INVALID,	"invalid",	"Invalid OS",		},
 	{       IH_OS_ARM_TRUSTED_FIRMWARE, "arm-trusted-firmware", "ARM Trusted Firmware"  },
 	{	IH_OS_LINUX,	"linux",	"Linux",		},
-#if defined(USE_HOSTCC)
-	{	IH_OS_LYNXOS,	"lynxos",	"LynxOS",		},
-#endif
 	{	IH_OS_NETBSD,	"netbsd",	"NetBSD",		},
 	{	IH_OS_OSE,	"ose",		"Enea OSE",		},
 	{	IH_OS_PLAN9,	"plan9",	"Plan 9",		},