Replace non-ASCII characters with ASCII characters

There is no point to use non-ASCII characters in this file when
perfectly fine ASCII characters are available..

Signed-hostap: Jouni Malinen <j@w1.fi>

hostapd/hostapd.conf

@@ -494,7 +494,7 @@ wmm_ac_vo_acm=0
 # else reserved (default)
 #
 # Number of Sounding Dimensions: [SOUNDING-DIMENSION-2]
-# Beamformer’s capability indicating the maximum value of the NUM_STS parameter
+# Beamformer's capability indicating the maximum value of the NUM_STS parameter
 # in the TXVECTOR of a VHT NDP
 # If SU beamformer capable, set to maximum value minus 1
 # else reserved (default)
@@ -527,7 +527,7 @@ wmm_ac_vo_acm=0
 # Indicates the maximum length of A-MPDU pre-EOF padding that the STA can recv
 # This field is an integer in the range of 0 to 7.
 # The length defined by this field is equal to
-# 2 pow(13 + Maximum A-MPDU Length Exponent) –1 octets
+# 2 pow(13 + Maximum A-MPDU Length Exponent) -1 octets
 #
 # VHT Link Adaptation Capable: [VHT-LINK-ADAPT2] [VHT-LINK-ADAPT3]
 # Indicates whether or not the STA supports link adaptation using VHT variant