x86, random: make ARCH_RANDOM prompt if EMBEDDED, not EXPERT

Before v2.6.38 CONFIG_EXPERT was known as CONFIG_EMBEDDED but the
Kconfig entry was not changed to match when upstream commit
628c6246 ("x86, random: Architectural
inlines to get random integers with RDRAND") was backported.
Signed-off-by: Romain Francoise <romain@orebokech.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit 119274d6)

(cherry picked from commit HEAD)
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

arch/x86/Kconfig

@@ -1528,7 +1528,7 @@ config ARCH_USES_PG_UNCACHED
 
 config ARCH_RANDOM
 	def_bool y
-	prompt "x86 architectural random number generator" if EXPERT
+	prompt "x86 architectural random number generator" if EMBEDDED
 	---help---
 	  Enable the x86 architectural RDRAND instruction
 	  (Intel Bull Mountain technology) to generate random numbers.