arch/tile: use better "punctuation" for VMSPLIT_3_5G and friends

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

arch/tile/Kconfig

@@ -236,9 +236,9 @@ choice
 	  If you are not absolutely sure what you are doing, leave this
 	  option alone!
 
-	config VMSPLIT_375G
+	config VMSPLIT_3_75G
 		bool "3.75G/0.25G user/kernel split (no kernel networking)"
-	config VMSPLIT_35G
+	config VMSPLIT_3_5G
 		bool "3.5G/0.5G user/kernel split"
 	config VMSPLIT_3G
 		bool "3G/1G user/kernel split"
@@ -252,8 +252,8 @@ endchoice
 
 config PAGE_OFFSET
 	hex
-	default 0xF0000000 if VMSPLIT_375G
-	default 0xE0000000 if VMSPLIT_35G
+	default 0xF0000000 if VMSPLIT_3_75G
+	default 0xE0000000 if VMSPLIT_3_5G
 	default 0xB0000000 if VMSPLIT_3G_OPT
 	default 0x80000000 if VMSPLIT_2G
 	default 0x40000000 if VMSPLIT_1G